earth

Its ecosystem is being destroyed so maybe that's why

Drymornis bridgesii

Can we just talk about how great frogs are?

Frog facts:

Frogs have a thin, permeable skin which lets liquids and gasses pass straight through. This thin skin is also very sensitive to temperature, sucks up pollutants and toxins, and absorbs water – removing the need for frogs to drink. These unique qualities make frogs superstar bioindicators, which means that scientists can use data gathered from frogs to get a better understanding of an ecosystem’s environmental health. Because frogs live in water as well as on land, they can provide an indication of both habitats.

Frogs play an important role as both predators and prey in the food web. Frogs’ diets consist of large quantities of insects, including pests, helping to keep population sizes of these unwanted critters at bay. Frog eggs provide food for insects, like spiders and wasps, while tadpoles fill the bellies of fish, birds and some insects. With a wide range of birds, mammals and reptiles relying on adult frogs for food, their disappearance would drastically affect entire ecosystems.

Without frogs as predators, populations of mosquitoes, which are carriers of disease, will increase. Having frogs around can help to keep mosquito-transmitted diseases, like dengue and malaria, from spreading to humans.

Also look at them, they're cute as shit.

There were probably hundreds of them on this building, not sure why they like it so much

A worm has been revived after 46,000 years in the Siberian permafrost | CNN

Scientists have revived a worm that was frozen 46,000 years ago — at a time when woolly mammoths, sabre-toothed tigers and giant elks still roamed the Earth.

The roundworm, of a previously unknown species, survived 40 meters (131.2 feet) below the surface in the Siberian permafrost in a dormant state known as cryptobiosis, according to Teymuras Kurzchalia, professor emeritus at the Max Planck Institute of Molecular Cell Biology and Genetics in Dresden and one of the scientists involved in the research....

I sell commercial solar arrays. I am proud as hell of making an actual, meaningful climate impact.

Painite is one of the rarest gem mineral in the world. Only about 300 painite crystals have ever been found, and most of them are very small. The largest painite crystal ever found is only about 2.5 centimeters in length. Because of its rarity, painite is also one of the most expensive gem minerals in the world.

...

The invasive species is one concept among many inculcated by capitalist ideology, sublimating our intertwined social and ecological crises, transforming them into problems amenable to various kinds of security regimes. From border walls to fish dams, from militarized police departments to invasive species eradication campaigns, the capitalist state can only do so much to tamp down the mounting symptoms of an economic order at war with the planet’s ecology, and therefore its own survival. Consigned to leaving the roots untouched—that is, to ensure the reproduction of capitalism at all costs—the masters of humankind are vigorously pruning the branches that support their own weight.

...

We should have a comm for photos

I'm treating this like adult Pokemon and my friends aren't getting my excitement when I find a new bird.

Also I've been checking in on some juvenile Bald Eagles near me here's a picture I could get of one:

"Tricyclic antidepressants can cause you to sweat less," Wheate said, "because they act as anticholinergics, which means they basically stop your sweat glands from producing sweat. We sweat to cool down, so if you're not sweating then you can't regulate your body temperature properly and you're likely to overheat."

Selective serotonin reuptake inhibitors, on the other hand, make you sweat more.

...

He suggested having a fan blow over you if you're taking tricyclic antidepressants, so that even though you're sweating less, the sweat you are producing is more effective at wicking away heat from your body.

For those on SSRIs, Wheate said that drinking lots to replace lost fluids is the best thing you can do. But, he said, "you don't want to just drink water — you need to drink something salty or slightly sugary because when you sweat you don't just lose the water, you lose salts and sugars, and you need to replace those."

Ketamine makes you sweat honeydew like an aphid

very pleasing. very very pleasing.

As the planet warms, mosquitoes are slowly migrating to higher places — and bringing malaria to populations not used to dealing with the potentially deadly disease.

Researchers have documented the insects making their homes in higher places that are typically too cool for them, from the tropical highlands of South America to the mountainous but populous regions of eastern Africa. A recent Georgetown University study found them moving upward in sub-Saharan Africa at the rate of 21 feet per year.

“The link between climate change and expansion or change in mosquito distributions is real,” said Doug Norris, a specialist in mosquitoes at the Johns Hopkins Bloomberg School of Public Health.

It’s difficult to pinpoint how these shifting mosquito populations will affect specific populations, Norris said, in part because people have gotten better at fighting malaria.

Global deaths from the disease declined by 27 percent between 2002 and 2021, as countries have adopted insecticide-treated nets, antimalarial drugs, and tests. Eighteen million doses of a new malaria vaccine are set to be distributed across Africa in the next two years.

But the world faces new threats: U.S. health officials say the first malaria cases in the United States since 2003 were found in Florida and Texas in May and June, and an invasive mosquito species is likely behind spikes in malaria in Djibouti and Ethiopia. Climate change presents another emerging threat, World Health Organization officials wrote in their latest global malaria report.

But scientists agree mosquitoes are on the move.

One study published in 2016 found the habitat for malaria-carrying mosquitoes had expanded on the higher elevations of Kilimanjaro by hundreds of square kilometers in just 10 years. The densely populated region faces new risks from malaria as a result, the research found, especially considering the population has not faced much exposure before. Meanwhile, the study found fewer mosquitoes at warming lower elevations.

“As it gets warmer at higher altitudes with climate change and all of these other environmental changes, then mosquitoes can survive higher up the mountain,” said Manisha Kulkarni, a professor and researcher studying malaria in sub-Saharan Africa at the University of Ottawa.

The region Kulkarni studied, which is growing in population, is close to the border of Tanzania and Kenya. Together, the two countries accounted for 6 percent of global malaria deaths in 2021.

The mosquito’s migration has been seen elsewhere. For example, researchers in 2015 noticed native birds in Hawaii were squeezed out of lower elevation habitats as mosquitoes carrying avian malaria slowly migrated upward into their territory.

But given that 96 percent of malaria deaths in 2021 occurred in Africa, with children under 5 years old accounting for the majority of those fatalities, most research on the trend is found there.

Jeremy Herren, who studies malaria at the Nairobi-based International Centre of Insect Physiology and Ecology, said there is evidence that warming temperatures influence where mosquito populations choose to live. But it’s challenging to make sweeping predictions about how that will affect the spread of malaria, he said.

For example, Herren noted the long-dominant mosquito species in Kenya fell off in the mid-2000s, around the same time that insecticide-treated nets were widely distributed. The species is now nearly impossible to find, he said, a shift that is likely not attributable to climate change.

Mosquitoes are also picky about their habitat, Norris said. The different malaria-carrying species have various preferences in temperature, humidity, and amount of rainfall. In general, however, mosquito larvae grow faster in warmer conditions, he said.

Rising temperatures are also not the only way a changing climate gives mosquitoes the upper hand. The bugs tend to thrive in the kind of extremes that are happening more frequently because of human-caused climate change. 

Longer rainy seasons can create better habitats for mosquitoes, which breed in water. But conversely, while droughts can dry up those habitats, they also encourage people to store water in containers, creating perfect breeding sites. An outbreak of chikungunya, another mosquito-borne disease, between 2004 and 2005 was linked to drought in coastal Kenya for these reasons.

Researchers found malaria cases in the highlands of Ethiopia fell in the early 2000s in tandem with a decline in temperatures as global warming temporarily stalled.

Pamela Martinez, a researcher at the University of Illinois, said her team’s findings on malaria trends in Ethiopia, published in 2021 in the journal Nature, lent more confidence to the idea that malaria and temperature — and therefore climate change — are linked.

“We see that when temperature goes down, the overall trend of cases also goes down, even in the absence of intervention,” Martinez said. “That proves the case that temperature has an impact on transmission.”

The researchers also noticed mosquito populations creeping upward to higher elevations during warmer years. 

Ethiopia’s temperatures began to warm again in the mid-2000s, but public health officials also ramped up efforts to control malaria in the highlands around that time, which has contributed to a sustained decline in cases.  But even as the Ethiopian Ministry of Health drafted a plan to eliminate malaria by 2030, its authors laid out the threats to that goal: population shifts, a lack of funding, the invasion of a new mosquito species, and climate change.

The orca (Orcinus orca), also called killer whale, is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member. It is the only extant species in the genus Orcinus and is recognizable by its black-and-white patterned body. A cosmopolitan species, orcas can be found in all of the world's oceans in a variety of marine environments, from Arctic and Antarctic regions to tropical seas.

Orcas have a diverse diet, although individual populations often specialize in particular types of prey. Some feed exclusively on fish, while others hunt marine mammals such as seals and other species of dolphin. They have been known to attack baleen whale calves, and even adult whales. Orcas are apex predators, as they have no natural predators. They are highly social; some populations are composed of very stable matrilineal family groups (pods) which are the most stable of any animal species. Their sophisticated hunting techniques and vocal behaviours, which are often specific to a particular group and passed across generations, have been described as manifestations of animal culture.

The International Union for Conservation of Nature assesses the orca's conservation status as data deficient because of the likelihood that two or more orca types are separate species. Some local populations are considered threatened or endangered due to prey depletion, habitat loss, pollution (by PCBs), capture for marine mammal parks, and conflicts with human fisheries. In late 2005, the southern resident orcas, which swim in British Columbia and Washington waters, were placed on the U.S. Endangered Species list.

Wild orcas are not considered a threat to humans, and no fatal attack on humans has ever been documented. There have been cases of captive orcas killing or injuring their handlers at marine theme parks. Orcas feature strongly in the mythologies of indigenous cultures, and their reputation in different cultures ranges from being the souls of humans to merciless killers.

Naming Orcas are commonly referred to as "killer whales", despite being a type of dolphin.[6] Since the 1960s, the use of "orca" instead of "killer whale" has steadily grown in common use.

The genus name Orcinus means "of the kingdom of the dead", or "belonging to Orcus". Ancient Romans originally used orca (pl. orcae) for these animals, possibly borrowing Ancient Greek ὄρυξ (óryx). This word referred (among other things) to a whale species, perhaps a narwhal. As part of the family Delphinidae, the species is more closely related to other oceanic dolphins than to other whales

Types

The three to five types of orcas may be distinct enough to be considered different races, subspecies, or possibly even species. Although large variation in the ecological distinctiveness of different orca groups complicate simple differentiation into types, research off the west coast of North America has identified fish-eating "residents", mammal-eating "transients" and "offshores"

Other populations have not been as well studied, although specialized fish and mammal eating orcas have been distinguished elsewhere. Mammal-eating orcas in different regions were long thought likely to be closely related, but genetic testing has refuted this hypothesis.

Range and habitat

Orcas are found in all oceans and most seas. Due to their enormous range, numbers, and density, relative distribution is difficult to estimate, but they clearly prefer higher latitudes and coastal areas over pelagic environments. Areas which serve as major study sites for the species include the coasts of Iceland, Norway, the Valdes Peninsula of Argentina, the Crozet Islands, New Zealand and parts of the west coast of North America, from California to Alaska. Systematic surveys indicate the highest densities of orcas (>0.40 individuals per 100 km2) in the northeast Atlantic around the Norwegian coast, in the north Pacific along the Aleutian Islands, the Gulf of Alaska and in the Southern Ocean off much of the coast of Antarctica. They are considered "common" (0.20–0.40 individuals per 100 km2) in the eastern Pacific along the coasts of British Columbia, Washington and Oregon, in the North Atlantic Ocean around Iceland and the Faroe Islands.

In the Antarctic, orcas range up to the edge of the pack ice and are believed to venture into the denser pack ice, finding open leads much like beluga whales in the Arctic. However, orcas are merely seasonal visitors to Arctic waters, and do not approach the pack ice in the summer. With the rapid Arctic sea ice decline in the Hudson Strait, their range now extends deep into the northwest Atlantic. Occasionally, orcas swim into freshwater rivers. They have been documented 100 mi (160 km) up the Columbia River in the United States. They have also been found in the Fraser River in Canada and the Horikawa River in Japan.

Migration patterns are poorly understood. Each summer, the same individuals appear off the coasts of British Columbia and Washington. Despite decades of research, where these animals go for the rest of the year remains unknown. Transient pods have been sighted from southern Alaska to central California.

Feeding

Orcas are apex predators, meaning that they themselves have no natural predators. They are sometimes called "wolves of the sea", because they hunt in groups like wolf packs. Orcas hunt varied prey including fish, cephalopods, mammals, seabirds, and sea turtles. Different populations or ecotypes may specialize, and some can have a dramatic impact on prey species. However, whales in tropical areas appear to have more generalized diets due to lower food productivity. Orcas spend most of their time at shallow depths, but occasionally dive several hundred metres depending on their prey.

Behaviour

Day-to-day orca behaviour generally consists of foraging, travelling, resting and socializing. Orcas frequently engage in surface behaviour such as breaching (jumping completely out of the water) and tail-slapping. These activities may have a variety of purposes, such as courtship, communication, dislodging parasites, or play. Spyhopping is a behaviour in which a whale holds its head above water to view its surroundings. Resident orcas swim alongside porpoises and other dolphins.

Orcas will engage in surplus killing, that is, killing that is not designed to be for food. As an example, a BBC film crew witnessed orca in British Columbia playing with a male Steller sea lion to exhaustion, but not eating it.

Social structure

Orcas are notable for their complex societies. Only elephants and higher primates live in comparably complex social structures. Resident orcas in the eastern North Pacific live in particularly complex and stable social groups. Unlike any other known mammal social structure, resident whales live with their mothers for their entire lives. These family groups are based on matrilines consisting of the eldest female (matriarch) and her sons and daughters, and the descendants of her daughters, etc.

Like all cetaceans, orcas depend heavily on underwater sound for orientation, feeding, and communication. They produce three categories of sounds: clicks, whistles, and pulsed calls. Clicks are believed to be used primarily for navigation and discriminating prey and other objects in the surrounding environment, but are also commonly heard during social interactions.

Intelligence

Orcas have the second-heaviest brains among marine mammals. People who have interacted closely with orcas offer numerous anecdotes demonstrating the whales' curiosity, playfulness, and ability to solve problems. Alaskan orcas have not only learned how to steal fish from longlines, but have also overcome a variety of techniques designed to stop them, such as the use of unbaited lines as decoys.

In other anecdotes, researchers describe incidents in which wild orcas playfully tease humans by repeatedly moving objects the humans are trying to reach, or suddenly start to toss around a chunk of ice after a human throws a snowball.

The orca's use of dialects and the passing of other learned behaviours from generation to generation have been described as a form of animal culture.

Relationship with humans

The indigenous peoples of the Pacific Northwest Coast feature orcas throughout their art, history, spirituality and religion. The Haida regarded orcas as the most powerful animals in the ocean, and their mythology tells of orcas living in houses and towns under the sea. In Nuu-chah-nulth and Kwakwaka'wakw mythology, orcas may embody the souls of deceased chiefs. The Tlingit of southeastern Alaska regarded the orca as custodian of the sea and a benefactor of humans.

In the tales and beliefs of the Siberian Yupik people, orcas are said to appear as wolves in winter, and wolves as orcas in summer. The Ainu people of Hokkaido, the Kuril Islands, and southern Sakhalin often referred to orcas in their folklore and myth as Repun Kamuy (God of Sea/Offshore) to bring fortunes (whales) to the coasts, and there had been traditional funerals for stranded or deceased orcas akin to funerals for other animals such as brown bears.

"Killer" stereotype

In Western cultures, orcas were historically feared as dangerous, savage predators. Of the very few confirmed attacks on humans by wild orcas, none have been fatal. Unlike wild orcas, captive orcas have made nearly two dozen attacks on humans since the 1970s, some of which have been fatal. Competition with fishermen also led to orcas being regarded as pests. In the waters of the Pacific Northwest and Iceland, the shooting of orcas was accepted and even encouraged by governments.

Popocatépetl is an active stratovolcano located in the states of Puebla, Morelos, and Mexico in central Mexico. It lies in the eastern half of the Trans-Mexican volcanic belt. At 5,426 m (17,802 ft) it is the second highest peak in Mexico, after Citlaltépetl (Pico de Orizaba) at 5,636 m (18,491 ft).

It is linked to the twin volcano of Iztaccihuatl to the north by the high saddle known as the "Paso de Cortés". Izta-Popo Zoquiapan National Park, wherein the two volcanoes are located, is named after them.

Popocatépetl is 70 km (43 mi) southeast of Mexico City, from where it can be seen regularly, depending on atmospheric conditions. Until recently, the volcano was one of three tall peaks in Mexico to contain glaciers, the others being Iztaccihuatl and Pico de Orizaba. In the 1990s, the glaciers such as Glaciar Norte (North Glacier) greatly decreased in size, partly due to warmer temperatures but largely due to increased volcanic activity. By early 2001, Popocatépetl's glaciers were gone; ice remained on the volcano, but no longer displayed the characteristic features of glaciers such as crevasses.

Lava erupting from Popocatépetl has historically been predominantly andesitic, but it has also erupted large volumes of dacite. Magma produced in the current cycle of activity tends to be a mixture of the two with the andesites being rich in magnesium.

The name Popocatépetl comes from the Nahuatl words popōca (Nahuatl pronunciation: [poˈpoːka]) "it smokes" and tepētl [ˈtepeːt͡ɬ] "mountain", meaning Smoking Mountain. The volcano is also referred to by Mexicans as El Popo affectionately, or to shorten the full name.

Geology

The stratovolcano contains a steep-walled, 400 m × 600 m (1,300 ft × 2,000 ft) wide crater. The generally symmetrical volcano is modified by the sharp-peaked Ventorrillo on the NW, a remnant of an earlier volcano. At least three previous major cones were destroyed by gravitational failure during the Pleistocene, producing massive debris avalanche deposits covering broad areas south of the volcano. The modern volcano was constructed to the south of the late-Pleistocene to Holocene El Fraile cone. Three major Plinian eruptions, the most recent of which took place about 800 AD, have occurred from Popocatépetl since the mid-Holocene, accompanied by pyroclastic flows and voluminous lahars that swept basins below the volcano.

According to paleomagnetic studies, the volcano is about 730,000 years old. It is cone shaped with a diameter of 25 km (16 mi) at its base, with a peak elevation of 5,450 m (17,880 ft). The crater is elliptical with an orientation northeast-southwest. The walls of the crater vary from 600 to 840 m (1,970 to 2,760 ft) in height. Popocatépetl is currently active after being dormant for about half of last century. Its activity increased in 1991 and smoke has been seen constantly emanating from the crater since 1993.

History

The geological history of Popocatépetl began with the formation of the ancestral volcano Nexpayantla. About 200,000 years ago, Nexpayantla collapsed in an eruption, leaving a caldera, in which the next volcano, known as El Fraile, began to form. Another eruption about 50,000 years ago caused that to collapse, and Popocatépetl rose from that. Around 23,000 years ago, a lateral eruption (believed to be larger than the 1980 eruption of Mount St. Helens) destroyed the volcano's ancient cone and created an avalanche that reached up to 70 kilometres (43 mi) from the summit. The debris field from that is one of four around the volcano, and it is also the youngest.

Three Plinian eruptions are known to have taken place: 3,000 years ago (3195–2830 BC), 2,150 years ago (800–215 BC), and 1,100 years ago (likely 823 AD). The latter two buried the nearby village of Tetimpa, preserving evidence of preclassical culture.

Popocatépetl is one of the most active volcanoes in Mexico and the most famous, having had more than 15 major eruptions since the arrival of the Spanish in 1519.

Legend

Popocatépetl and Iztaccíhuatl refers to the volcanoes Popocatépetl ("the Smoking Mountain") and Iztaccíhuatl ("white woman" in Nahuatl, sometimes called the Mujer Dormida "sleeping woman" in Spanish) in Iztaccíhuatl–Popocatépetl National Park, which overlook the Valley of Mexico and the various myths explaining their existence. The most common variety relates the Nahua romance of the princess Iztaccíhuatl and the warrior Popocatépetl. This tale is recorded in several different versions.

In Aztec mythology, Iztaccíhuatl was a princess who fell in love with one of her father's warriors, Popocatépetl. The emperor sent Popocatépetl to war in Oaxaca, promising him Iztaccíhuatl as his wife when he returned (which Iztaccíhuatl's father presumed he would not). Iztaccíhuatl was falsely told that Popocatépetl had died in battle, and believing the news, she died of grief. When Popocatépetl returned to find his love dead, he took her body to a spot outside Tenochtitlan and kneeled by her grave. The gods covered them with snow and changed them into mountains. Iztaccíhuatl's mountain is called "Sleeping Woman" (Though the Nahuatl name literally means "White Woman" from iztāc "white" and cihuātl "woman") because it resembles a woman lying on her back, and is often covered with snow — the peak is sometimes nicknamed La Mujer Dormida, "The Sleeping Woman". Popocatépetl became an active volcano, raining fire on Earth in blind rage at the loss of his beloved.

A different tale was told by the Nahuatl-speakers of Tetelcingo, Morelos, according to whom Iztaccíhuatl was the wife of Popo, but Xinantécatl wanted her, and he and Popocatépetl hurled rocks at each other in anger. This was the genesis of the rocky mountain ranges of the continental divide and the Trans-Mexican volcanic belt that lie between the two mountains. Finally Popocatépetl, in a burst of rage, flung an enormous chunk of ice, decapitating the Nevado de Toluca. This is why the Nevado is flat-topped, with wide shoulders but no head. Conceivably this legend preserves the memory of catastrophic eruptions.

The most popular legend about Iztaccíhuatl and Popocatépetl comes from the ancient Nahuas

Many years before conquistador Hernán Cortés came to Mexico, the Aztecs lived in Tenochtitlan, today's Mexico City. The chief of the Aztecs was a famous Emperor, who was loved by all the natives. The Emperor and his wife, the Empress, were very worried because they had no children. One day the Empress said to the Emperor that she was going to give birth to a child. A baby girl was born and she was as beautiful as her mother. They called her Iztaccíhuatl, which in Náhuatl means "white lady". All the natives loved Izta, and her parents prepared her to be the Empress of the Aztecs. When she grew up, she fell in love with a captain of a tribe, his name was Popoca, however the Emperor would not allow them to marry. One day, a war broke out with the fate of the Empire at stake, and the Aztec warriors had to go South to fight the enemy. The Emperor told Popoca that he had to bring the head of the enemy chief back from the war, so he could marry his daughter. After several months of combat, a warrior who hated Popoca sent a false message to the Emperor. The message said that his army had won the war, but that Popoca had died in battle. The Emperor was very sad when he heard the news, and when Izta heard she could not stop crying. She refused to go out and did not eat any more. A few days later, she became ill and she died of sadness. When the Emperor was preparing Izta's funeral, Popoca and his warriors arrived victorious from war. The Emperor was taken aback when he saw Popoca but prepared to offer the throne, to which Popoca turned down as he only wanted to marry Izta. The Emperor announced that Izta had died of a broken heart. Popoca killed the warriors who had sent the false message to the Emperor. He then took Izta's body and left the town. He walked a long way until he arrived at some mountains where he ordered his warriors to build a funeral table with flowers and he put Izta lying on top. Then he knelt down to watch over Izta and died of sadness too. The Gods were touched by Popoca's sacrifice and turned the tables and the bodies into great volcanoes. The biggest volcano is Popocatépetl, which in Náhuatl means "smoking mountain". He sometimes throws out smoke, showing that he is still watching over Iztaccíhuatl, who sleeps by his side

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The black caiman is a crocodilian reptile endemic to South America. With a maximal length of 5 to 6 m (16 to 20 ft) and a mass of over 450 kg (1,000 lb), it is the largest species of the family Alligatoridae and the third largest in the Neotropical realm. Like what its common and scientific names implies, the black caiman has a dark coloration as an adult. In some individuals, the dark coloration can appear almost black. It has grey to brown banding on the lower jaw. Juveniles have a more vibrant coloration compared to adults with prominent white to pale yellow banding on the flanks that remains present well into adulthood, at least more when compared to other species. The morphology is quite different from other caimans but the bony ridge that occurs in other caimans is present. The head is large and heavy, an advantage in catching larger prey. Like all crocodile-like animals, caimans are long, squat creatures, with big jaws, long tails and short legs. They have thick, scaled skin, and their eyes and noses are located on the tops of their heads. This enables them to see and breathe while the rest of their bodies are underwater.

A carnivorous animal, the black caiman lives along freshwater habitats, including slow-moving rivers, lakes and seasonally flooded savannas, where it preys upon a variety of fish, reptiles, birds, and mammals. Being an apex predator and potentially a keystone species, it is generalist, capable of taking most animals within its range, and might have played a critical role in maintaining structure of the ecosystem. Although merely few specific ecological studies have been conducted, it is observed that this species has its own niche which allows coexistence with other competitors.

Reproduction takes place in the dry season. Females build a nest mound with an egg chamber, protecting the eggs from predators. Hatchlings form groups called pods, guarded by the presence of the female. These pods may contain individuals from other nests. Once common, it was hunted to near extinction primarily for its commercially valuable hide. It is now making a comeback, listed as Conservation Dependent. Overall a little-known species, it was not researched in any detail until the 1980s, when the leather-trade had already taken its toll. It is a dangerous species to humans, and attacks have occurred in the past

Characteristics

The black caiman has dark-coloured, scaly skin. The skin coloration helps with camouflage during its nocturnal hunts, but may also help absorb heat (see thermoregulation). The lower jaw has grey banding (brown in older animals), and pale yellow or white bands are present across the flanks of the body, although these are much more prominent in juveniles. This banding fades only gradually as the animal matures. The bony ridge extending from above the eyes down the snout, as seen in other caiman, is present. The eyes are large, as befits its largely nocturnal activity, and brown in colour. Mothers on guard near their nests are tormented by blood-sucking flies that gather around their vulnerable eyes, leaving them bloodshot.

The black caiman is one of the largest predators in the Amazon basin and the largest member of the Alligatoridae family, making it one of the largest extant reptiles. Most adult black caimans are 2.2 to 4.3 m (7 ft 3 in to 14 ft 1 in) in length, with a few old males exceeding 5 m (16 ft 5 in). Sub-adult male specimens of around 2.5 to 3.4 m (8 ft 2 in to 11 ft 2 in) will weigh roughly 95 to 125 kg (209 to 276 lb), around the same size as a mature female, but will quickly increase in bulk and weight.

Behaviour

Black caimans are apex predators with a generalist diet, and can take virtually any terrestrial and riparian animal found throughout their range. Similar to other large crocodilians, black caimans have even been observed catching and eating smaller species, such as the spectacled caiman and sometimes cannibalizing smaller individuals of their own kind. Hatchlings mostly eat small fish, frogs, and invertebrates such as crustaceans and insects, but with time and size graduate to eating larger fish, including piranhas, catfish, and perch, as well as molluscs, which remain a significant food source for all black caimans. Dietary studies have focused on young caimans (due both to their often being more common than large adults and to their being easier to handle), the largest specimen examined for stomach contents in one study being only 1.54 m (5 ft 1 in) notably under sexually mature size, which is at a minimum 2 m (6 ft 7 in) in smaller females. Although diverse prey is known to be captured by young black caimans, dietary studies have shown snails often dominate the diet of young caiman, followed by quite small fish.

Many predators, including various fish, mammal, reptile and even amphibian species, feed on caiman eggs and hatchlings. The black caiman shares its habitat with at least 3 other semi-amphibious animals considered apex predators, usually able to co-exist with them by focusing on different prey and micro-habitats. These are giant otters which are social and are obligate aquatic foragers and piscivorans, green anacondas which are predators of smaller species of caiman albeit not regularly, and jaguars, which are the most terrestrial of these and focus their diet mainly on relatively larger mammals and terrestrial reptiles.

Megathreads and spaces to hang out:

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• 💙‎Comprehensive list of resources for those in need of an abortion -- reddit link
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• ❤️Foundations of Leninism
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Removing rocks from the stream bed or stream edge to stack or throw can be aesthetically pleasing, but very damaging to the habitat you remove them from in both the short and long term. In the short term you are altering water currents, potentially speeding up certain areas and slowing down others which not only displaces wildlife in both of those areas, but may result in neither being suitable for habitation. It also creates a cascading effect in water flow, causing sediment to settle in areas of what is now slow flow and increasing erosion in areas of high speed flow. This disturbs the physical environment of the waterway, as well as its chemical (nutrient), chronological (change over time) development, and oxygenation.

In the long term, moving rocks brings about another issue, which is erosion. All waterways are shaped by erosion, and a rule in geology is the bigger the rock, the more force it takes to move. This rule is universal from boulders all the way down to individual clay particles. Your ability as a person to lift an even moderately sized rock has a monumental impact on the dynamics of the waterway. In some areas, a rock that may fit in just the palm of your hand might only be able to be moved by a once in a generation flood event. A stack of 3 or 4 of these rocks removes the equivalent of HUNDREDS of years of potential habitats, oxygen infusion into the water, or accelerates/decelerates the rate of erosion in the area you removed/added the rocks by hundreds of years. Simultaneously, you are impacting the riparian zone (edge of the waterway), an incredibly important habitat for terrestrial, aquatic, and amphibious plant and animal life. Changes erosion at the edge of a stream, river, or lake impact the whole body of water in all of the same ways as listed above.

Knowing when not to intervene is an equally important aspect of being a good steward to your natural environment as knowing when to intervene. Let nature do it’s thing and you’ll have even more beauty to enjoy when you are surrounded by it

Cretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era. The Cretaceous began 145.0 million years ago and ended 66 million years ago; it followed the Jurassic Period and was succeeded by the Paleogene Period (the first of the two periods into which the Tertiary Period was divided). The Cretaceous is the longest period of the Phanerozoic Eon. Spanning 79 million years, it represents more time than has elapsed since the extinction of the dinosaurs, which occurred at the end of the period.

The name Cretaceous is derived from creta, Latin for “chalk,” and was first proposed by J.B.J. Omalius d’Halloy in 1822. D’Halloy had been commissioned to make a geologic map of France, and part of his task was to decide upon the geologic units to be represented by it. One of his units, the Terrain Crétacé, included chalks and underlying sands. Chalk is a soft, fine-grained type of limestone composed predominantly of the armourlike plates of coccolithophores, tiny floating algae that flourished during the Late Cretaceous.

The Cretaceous Period began with Earth’s land assembled essentially into two continents, Laurasia in the north and Gondwana in the south. These were almost completely separated by the equatorial Tethys seaway, and the various segments of Laurasia and Gondwana had already started to rift apart. North America had just begun pulling away from Eurasia during the Jurassic, and South America had started to split off from Africa, from which India, Australia, and Antarctica were also separating. When the Cretaceous Period ended, most of the present-day continents were separated from each other by expanses of water such as the North and South Atlantic Ocean. At the end of the period, India was adrift in the Indian Ocean, and Australia was still connected to Antarctica.

The climate was generally warmer and more humid than today, probably because of very active volcanism associated with unusually high rates of seafloor spreading. The polar regions were free of continental ice sheets, their land instead covered by forest. Dinosaurs roamed Antarctica, even with its long winter night.

The lengthy Cretaceous Period constitutes a major portion of the interval between ancient life-forms and those that dominate Earth today. Dinosaurs were the dominant group of land animals, especially “duck-billed” dinosaurs (hadrosaurs), such as Shantungosaurus, and horned forms, such as Triceratops. Giant marine reptiles such as ichthyosaurs, mosasaurs, and plesiosaurs were common in the seas, and flying reptiles (pterosaurs) dominated the sky. Flowering plants (angiosperms) arose close to the beginning of the Cretaceous and became more abundant as the period progressed. The Late Cretaceous was a time of great productivity in the world’s oceans, as borne out by the deposition of thick beds of chalk in western Europe, eastern Russia, southern Scandinavia, the Gulf Coast of North America, and western Australia. The Cretaceous ended with one of the greatest mass extinctions in the history of Earth, exterminating the dinosaurs, marine and flying reptiles, and many marine invertebrates.

The Cretaceous Period is biologically significant because it is a major part of the transition from the early life-forms of the Paleozoic Era to the advanced diversity of the current Cenozoic Era. For example, most if not all of the flowering plants (angiosperms) made their first appearance during the Cretaceous. Although dinosaurs were the dominant animals of the period, many modern animals, including the placental mammals, made their debut during the Cretaceous. Other groups—such as clams and snails, snakes and lizards, and most fishes—developed distinctively modern characteristics before the mass extinction marking the end of the period.

Marine life

The marine realm can be divided into two paleobiogeographic regions, the Tethyan and the boreal. This division is based on the occurrence of rudist-dominated organic reeflike structures. Rudists were large, rather unusual bivalves that had one valve shaped like a cylindrical vase and another that resembled a flattened cap. The rudists were generally dominant over the corals as framework builders. They rarely existed outside the Tethyan region, and the few varieties found elsewhere did not create reeflike structures. Rudist reeflike structures of Cretaceous age serve as reservoir rocks for petroleum in Mexico, Venezuela, and the Middle East.

Other organisms almost entirely restricted to the Tethys region were actaeonellid and nerineid snails, colonial corals, calcareous algae, larger bottom-dwelling (benthic) foraminiferans, and certain kinds of ammonites and echinoids. In contrast, belemnites were apparently confined to the colder boreal waters. Marine plankton took on a distinctly modern appearance by the end of the Cretaceous. The coccolithophores became so abundant in the Late Cretaceous that vast quantities accumulated to form the substance for which the Cretaceous Period was named—chalk.

Ammonites were numerous and were represented by a variety of forms ranging from the more-usual coiled types to straight forms. Some of the more-unusual ammonites, called heteromorphs, were shaped like fat corkscrews and hairpins.

Terrestrial life

Although the fossil record is irregular in quality and quantity for the Early Cretaceous, it is obvious that dinosaurs continued their lengthy dominance of the land. The Late Cretaceous record is much more complete, particularly in the case of North America and Asia. It is known, for instance, that during the Late Cretaceous many dinosaur types lived in relationships not unlike the present-day terrestrial mammal communities. Although the larger dinosaurs, such as the carnivorous Tyrannosaurus and the herbivorous Iguanodon, are the best-known, many smaller forms also lived in Cretaceous times. Triceratops, a large three-horned dinosaur, inhabited western North America during the Maastrichtian Age. The titanosaurs, a group of sauropods that included Argentinosaurus and Dreadnoughtus, emerged during the second half of the period and were the largest land animals that ever lived.

Various types of small mammals that are now extinct existed during the Triassic and Jurassic, but two important groups of modern mammals evolved during the Cretaceous. Placental mammals, which include most modern mammals (e.g., rodents, cats, whales, cows, and primates), evolved during the Late Cretaceous. Although almost all were smaller than present-day rabbits, the Cretaceous placentals were poised to take over terrestrial environments as soon as the dinosaurs vanished. Another mammal group, the marsupials, evolved during the Cretaceous as well. This group includes the native species of Australia, such as kangaroos and koalas, and the North American opossum.

In the air, the flying reptiles called pterosaurs dominated. One pterosaur, Quetzalcoatlus, from the latest Cretaceous of what is now Texas (U.S.), had a wingspan of about 15 metres (49 feet). Birds developed from a reptilian ancestor during the Jurassic and Cretaceous. Hesperornis was a Cretaceous genus of flightless diving bird that had large feet and sharp backward-directed teeth adapted for preying on fish.

The land plants of the Early Cretaceous were similar to those of the Jurassic. They included the cycads, ginkgoes, conifers, and ferns. The flowering plants (angiosperms) appeared in the Early Cretaceous, became common by the beginning of the middle of the Cretaceous, and came to represent the major component of the landscape by the mid-to-late Cretaceous. The oldest known fossil angiosperm is Montsechia vidalii, an aquatic plant that has been dated to 130 million to 125 million years ago. The angiosperm group included figs, magnolias, poplars, willows, sycamores, and herbaceous plants. With the advent of many new plant types, insects also diversified.

Cretaceous Era (Part one) : The pinnacle of the dinosaurs reign :croc-pog:

Prehistoric Planet series :grumpy-lizard:

Cretaceous Era (Part two) : pinnacle before the end :gator-bi:

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PREMISE ONE: Civilization is not and can never be sustainable. This is especially true for industrial civilization.

PREMISE TWO: Traditional communities do not often voluntarily give up or sell the resources on which their communities are based until their communities have been destroyed. They also do not willingly allow their landbases to be damaged so that other resources—gold, oil, and so on—can be extracted. It follows that those who want the resources will do what they can to destroy traditional communities.

PREMISE THREE: Our way of living—industrial civilization—is based on, requires, and would collapse very quickly without persistent and widespread violence.

PREMISE FOUR: Civilization is based on a clearly defined and widely accepted yet often unarticulated hierarchy. Violence done by those higher on the hierarchy to those lower is nearly always invisible, that is, unnoticed. When it is noticed, it is fully rationalized. Violence done by those lower on the hierarchy to those higher is unthinkable, and when it does occur is regarded with shock, horror, and the fetishization of the victims.

PREMISE FIVE: The property of those higher on the hierarchy is more valuable than the lives of those below. It is acceptable for those above to increase the amount of property they control—in everyday language, to make money—by destroying or taking the lives of those below. This is called production. If those below damage the property of those above, those above may kill or otherwise destroy the lives of those below. This is called justice.

PREMISE SIX : Civilization is not redeemable. This culture will not undergo any sort of voluntary transformation to a sane and sustainable way of living. If we do not put a halt to it, civilization will continue to immiserate the vast majority of humans and to degrade the planet until it (civilization, and probably the planet) collapses. The effects of this degradation will continue to harm humans and nonhumans for a very long time.

PREMISE SEVEN: The longer we wait for civilization to crash—or the longer we wait before we ourselves bring it down—the messier the crash will be, and the worse things will be for those humans and nonhumans who live during it, and for those who come after.

PREMISE EIGHT: The needs of the natural world are more important than the needs of the economic system.

Another way to put Premise Eight: Any economic or social system that does not benefit the natural communities on which it is based is unsustainable, immoral, and stupid. Sustainability, morality, and intelligence (as well as justice) require the dismantling of any such economic or social system, or at the very least disallowing it from damaging your landbase.

PREMISE NINE: Although there will clearly someday be far fewer humans than there are at present, there are many ways this reduction in population may occur (or be achieved, depending on the passivity or activity with which we choose to approach this transformation). Some will be characterized by extreme violence and privation: nuclear Armageddon, for example, would reduce both population and consumption, yet do so horrifically; the same would be true for a continuation of overshoot, followed by a crash. Other ways could be characterized by less violence. Given the current levels of violence by this culture against both humans and the natural world, however, it’s not possible to speak of reductions in population and consumption that do not involve violence and privation, not because the reductions themselves would necessarily involve violence, but because violence and privation have become the default of our culture. Yet some ways of reducing population and consumption, while still violent, would con- sist of decreasing the current levels of violence—required and caused by the (often forced) movement of resources from the poor to the rich—and would of course be marked by a reduction in current violence against the natural world. Personally and collectively we may be able to both reduce the amount and soften the character of violence that occurs during this ongoing and perhaps long- term shift. Or we may not. But this much is certain: if we do not approach it actively—if we do not talk about our predicament and what we are going to do about it—the violence will almost undoubtedly be far more severe, the privation more extreme.

PREMISE TEN: The culture as a whole and most of its members are insane. The culture is driven by a death urge, an urge to destroy life.

PREMISE ELEVEN: From the beginning, this culture—civilization—has been a culture of occupation.

PREMISE TWELVE: There are no rich people in the world, and there are no poor people. There are just people. The rich may have lots of pieces of green paper that many pretend are worth something—or their presumed riches may be even more abstract: numbers on hard drives at banks—and the poor may not. These “rich” claim they own land, and the “poor” are often denied the right to make that same claim. A primary purpose of the police is to enforce the delusions of those with lots of pieces of green paper. Those without the green papers generally buy into these delusions almost as quickly and completely as those with. These delusions carry with them extreme consequences in the real world.

PREMISE THIRTEEN: Those in power rule by force, and the sooner we break ourselves of illusions to the contrary, the sooner we can at least begin to make reasonable decisions about whether, when, and how we are going to resist.

PREMISE FOURTEEN: From birth on—and probably from conception, but I’m not sure how I’d make the case—we are individually and collectively enculturated to hate life, hate the natural world, hate the wild, hate wild animals, hate women, hate children, hate our bodies, hate and fear our emotions, hate our- selves. If we did not hate the world, we could not allow it to be destroyed before our eyes. If we did not hate ourselves, we could not allow our homes—and our bodies—to be poisoned.

PREMISE FIFTEEN: Love does not imply pacifism.

PREMISE SIXTEEN: The material world is primary.This does not mean that the spirit does not exist, nor that the material world is all there is. It means that spirit mixes with flesh. It means also that real world actions have real world consequences. It means we cannot rely on Jesus, Santa Claus, the Great Mother, or even the Easter Bunny to get us out of this mess. It means this mess really is a mess, and not just the movement of God’s eyebrows. It means we have to face this mess ourselves. It means that for the time we are here on Earth—whether or not we end up somewhere else after we die, and whether we are condemned or privileged to live here—the Earth is the point. It is primary. It is our home. It is everything. It is silly to think or act or be as though this world is not real and primary. It is silly and pathetic to not live our lives as though our lives are real.

PREMISE SEVENTEEN: It is a mistake (or more likely, denial) to base our decisions on whether actions arising from them will or won’t frighten fence-sitters, or the mass of Americans.

PREMISE EIGHTEEN: Our current sense of self is no more sustainable than our current use of energy or technology.

PREMISE NINETEEN: The culture’s problem lies above all in the belief that controlling and abusing the natural world is justifiable.

PREMISE TWENTY: Within this culture, economics—not community well-being, not morals, not ethics, not justice, not life itself—drives social decisions.

Modification of Premise Twenty: Social decisions are determined primarily (and often exclusively) on the basis of whether these decisions will increase the monetary fortunes of the decision-makers and those they serve.

Re-modification of Premise Twenty: Social decisions are determined primarily (and often exclusively) on the basis of whether these decisions will increase the power of the decision-makers and those they serve.

Re-modification of Premise Twenty: Social decisions are founded primarily (and often exclusively) on the almost entirely unexamined belief that the decision-makers and those they serve are entitled to magnify their power and/or financial fortunes at the expense of those below

Re-modification of Premise Twenty: If you dig to the heart of it—if there is any heart left—you will find that social decisions are determined primarily on the basis of how well these decisions serve the ends of controlling or destroying wild nature.