this post was submitted on 13 Mar 2026
89 points (100.0% liked)

Ask Science

16101 readers
100 users here now

Ask a science question, get a science answer.


Community Rules


Rule 1: Be respectful and inclusive.Treat others with respect, and maintain a positive atmosphere.


Rule 2: No harassment, hate speech, bigotry, or trolling.Avoid any form of harassment, hate speech, bigotry, or offensive behavior.


Rule 3: Engage in constructive discussions.Contribute to meaningful and constructive discussions that enhance scientific understanding.


Rule 4: No AI-generated answers.Strictly prohibit the use of AI-generated answers. Providing answers generated by AI systems is not allowed and may result in a ban.


Rule 5: Follow guidelines and moderators' instructions.Adhere to community guidelines and comply with instructions given by moderators.


Rule 6: Use appropriate language and tone.Communicate using suitable language and maintain a professional and respectful tone.


Rule 7: Report violations.Report any violations of the community rules to the moderators for appropriate action.


Rule 8: Foster a continuous learning environment.Encourage a continuous learning environment where members can share knowledge and engage in scientific discussions.


Rule 9: Source required for answers.Provide credible sources for answers. Failure to include a source may result in the removal of the answer to ensure information reliability.


By adhering to these rules, we create a welcoming and informative environment where science-related questions receive accurate and credible answers. Thank you for your cooperation in making the Ask Science community a valuable resource for scientific knowledge.

We retain the discretion to modify the rules as we deem necessary.


founded 2 years ago
MODERATORS
top 50 comments
sorted by: hot top controversial new old
[–] mech@feddit.org 110 points 2 weeks ago* (last edited 2 weeks ago) (6 children)

"If it's black, fight back. If it's brown, lie down."

That's shortened to the point of being useless and leaves out all parts that actually matter.
First of all, there are black grizzlies and brown "Black bears" and the sizes of the species overlap. It may be hard to identify a bear that's coming at you.

Here's what you should do: Carry bear spray whenever you're in bear country!

When you encounter a bear close up, stand still, take out your pepper spray (or anything you can use as a weapon) and start talking to it calmly. Let it know you're a human and neither aggressive nor afraid. Ask it how its day is going!

If it backs down, you walk backwards slowly till it's out of sight, then find a different route.
If it stops, advances or charges, you stand still, facing it. Don't run or climb a tree.
Most charges are mock charges where it'll stop before you.

If it doesn't stop and gets within 20 feet, shoot your bear spray, which resolves 98% of bear attacks without injury:
https://irp.cdn-website.com/01d676b7/files/uploaded/Tom_Smith_Research_Report___Efficacy_of_Bear_Spray_%281%29.pdf In the other 2%, fight for your life. Aim for the nose. Good Luck!

Lying down might sometimes be better if it's a Grizzly, depending on its reason for attacking you, but there's no way you can know that. Chances are, after its first slap you're lying down anyway.

Source: worked as a ranger in British Columbia

[–] Fondots@lemmy.world 20 points 2 weeks ago (4 children)

Just want to add, because as an outdoorsy guy in Pennsylvania, I'm a little dumbfounded by how many people seem to think we might have brown/grizzly bears in our neck of the woods.

There aren't. If you're reading this, odds are pretty good that you don't live in brown bear country, because you're probably in an English-speaking country, and just going by numbers you're probably not in the parts of western Canada, Alaska, or the tiny part of the Continental US (mostly just Yellowstone) where they can be found.

Everywhere else in North America it's black bears (or polar bears, but I really hope you don't need help identifying those, and maybe a handful of grizzly-polar bear hybrids)

If you're in Europe you have brown or polar bears.

If you're in Asia, you have a few species with a bit of overlap- brown, polar, panda, sun, and 2 or 3 other species I don't remember off the top of my head.

If you're in the Andes, you got spectacled bears.

If you're anywhere else in the world, read the sign by the cage because you're in a zoo.

Also, I have never encountered a black bear that didn't immediately fuck off the moment it noticed me. There are certainly bolder ones out there, and you should always take any reasonable precautions, but when I'm camping and hiking, bears are basically at the bottom of my list of concerns, squirrels, chipmunks, mice, etc. generally rank higher, I've had chipmunks try to get into my pack while I was sitting there watching it.

All my years of camping I've had exactly 1 incident with a bear back when I was in scouts, and it happened when we were all away from camp, it got into a box of cookware, and I suspect it probably immediately scared itself away when the pots and pans went clattering everywhere.

[–] mech@feddit.org 15 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

My experience with black bears as well. They fuck off as soon as they see you.
Grizzlies seemed more annoyed, like "Why's there a human in my woods? I just wanna chill."
So depending on their mood, they'll usually check you out, maybe try to get you to fuck off, and failing that, grudgingly walk away.

I actually missed the number one protection against bear (and cougar) attacks in my post:
Have a hiking partner and talk to them. Or sing to yourself.
That reduces the chance of even encountering a bear by a lot cause they hear you coming and avoid you well in advance.
The drawback is you won't get to see a bear.

Our bear safety trainer actually said step 1 in a bear encounter is: Take out your camera.
It puts you in a more reasonable mindset, cause almost no encounters lead to attacks. And you can take some sweet pictures.

[–] MrShankles@reddthat.com 7 points 2 weeks ago (3 children)
[–] mech@feddit.org 15 points 2 weeks ago (2 children)

Find cover. A big tree or big rock.
Use your small size and better maneuverability to keep the cover between you and the moose.
Move from cover to cover to create distance.
If there's no cover, run like hell. Moose are faster than you, but they often stop after a short distance.

[–] SupraMario@lemmy.world 9 points 2 weeks ago (1 children)

This reminds me of a story from a friend of mine who lived in Canada...he sent me texts with his car completely fucked in the middle of a two lane highway with no other cars or trees around... I asked what the hell did he hit, his response is that a moose had crashed into him, got up and just left. The entire passager side of the car looked like it had been smashed in by a big truck.

That was the day I learned that a moose is something you do not fuck with.

[–] mech@feddit.org 9 points 2 weeks ago (1 children)

A bull moose weighs up to 1600 pounds and is designed for repeated frontal collisions with another 1600 pound moose.

load more comments (1 replies)
load more comments (1 replies)
[–] PlaidBaron@lemmy.world 9 points 2 weeks ago

I had a friend from the UK who planned on biking across Canada (never happened). He asked what animals he should be scared of. It wasnt the bears. Its moose.

They look goofy as fuck, yes. But they can be aggressive for seemingly no reason and fuck you up real quick. Theyre big, heavy, strong, and have a fucking weapon strapped to their head.

Do. Not. Fuck. With. The. Moose.

[–] bobbosr2004@piefed.social 6 points 2 weeks ago (1 children)

A moose bit my sister once

[–] MrShankles@reddthat.com 5 points 2 weeks ago

Mynd you, m00se bites Kan be pretty nasti...

load more comments (3 replies)
[–] Dasus@lemmy.world 5 points 2 weeks ago

In the other 2%, fight for your life. Aim for the nose. Good Luck!

I mean, I guess, yeah,, that's what you should try. But I'd like to point out that whoever it was Romans or whatnot who used to pit bears against lions and they got bored of the matchup because the bears always won. And those won't have even been grizzlys, but likely European brown bears.

But yah guess one could get lucky and it's not like not-fighting will help either,

load more comments (3 replies)
[–] 667@lemmy.radio 64 points 2 weeks ago (2 children)

The brightest star in the sky is not the North Star (Polaris). If you follow the brightest star in the sky you will follow a planet and travel some curved path.

How to really find Polaris:

[–] blarghly@lemmy.world 19 points 2 weeks ago (4 children)

Cool, now how do I find those thingies?

[–] Arcadeep@lemmy.world 42 points 2 weeks ago
[–] fartographer@lemmy.world 24 points 2 weeks ago (1 children)

I always struggled with that, too, until my cousin taught me to use Cassiopeia. The other constellations use way too complex of shapes and require accuracy, and they're not super-bright.

Cassiopeia looks like a W or M. Look for 5 dots that could possibly form an ugly W where the left side is wider and more shallow than the right. It'll genuinely stand out like this.

Cassiopeia

There it is!

Cassiopeia identified

Now, mentally draw a straight line across the tips of the shallow side of the W. Then, draw a straight line through that starting from the bottom of the shallow side. You'll get something like an arrow shape. Keep following that perpendicular line away from the W until you find something nearby the line that is noticeably bright. That's Polaris!

Cassiopeia markup

After you find that, you can confirm you found the right star by looking for the dippers and shit.

load more comments (1 replies)
[–] starman2112@sh.itjust.works 14 points 2 weeks ago* (last edited 2 weeks ago)

Live somewhere dark enough and gain pattern recognition

Edit: This was kind of unhelpful, so I'll also recommend Stellarium. The Big Dipper is comprised of very bright stars, and is visible in the northern hemisphere year-round, so it's a good first constellation to learn. Once you get used to how it looks both on stellarium and in the night sky, you'll be better equipped to extrapolate how other constellations should look in the night sky, given how they look on stellarium. Once you start building those neural pathways, it gets a lot easier.

I realize this is basically just "git gud" but for astronomy, but it really is a matter of experience, not skill

[–] 667@lemmy.radio 5 points 2 weeks ago

Great question! Use https://stellarium-web.org/ and set it for your latitude or location, according to your preference, and then look toward the northern sky. You can set the app to highlight the constellations.

load more comments (1 replies)
[–] Ludicrous0251@piefed.zip 45 points 2 weeks ago (1 children)

Is you're lost but someone knows where you're supposed to be it's probably better to stay put.

Also moss can grow on any side of a tree.

[–] Nomad 8 points 2 weeks ago

Its wrong to stay put?

[–] DrBob@lemmy.ca 41 points 2 weeks ago (1 children)

Drink alcohol to stay warm.

[–] AffineConnection@lemmy.world 10 points 2 weeks ago (5 children)

Is that an actual, existing survival myth?

[–] blarghly@lemmy.world 29 points 2 weeks ago (1 children)

I mean, it definitely makes you warmer. In that it shunts your blood to the outer layer of your body, warming your skin and making you feel less cold. Problem is, this actually makes you lose heat more rapidly, and increases your susceptibility to hypothermia. But since you can experience "drink alcohol, feel warmer" yourself, the myth will probably persist indefinitely.

[–] SaneMartigan@aussie.zone 9 points 2 weeks ago* (last edited 2 weeks ago)

It is calories too, so can be drunk for energy if you're out of food.

[–] jeffw@lemmy.world 11 points 2 weeks ago

Sadly, I think some people believe it.

But other people think you get sick from being outside in the cold

[–] Chozo@fedia.io 7 points 2 weeks ago

Yes. It's where the old meme of St Bernards carrying little flasks of alcohol came from. The idea was if you were injured in the cold, alcohol would warm you up.

You may feel warmer. But it actually lowers your core temp, IIRC.

[–] FaceDeer@fedia.io 6 points 2 weeks ago (1 children)

It actually was the case, in the olden days.

The classic image of St. Bernard rescue dogs carrying tiny barrels of brandy for the benefit of hypothermic travellers was a myth though.

load more comments (1 replies)
[–] kn33@lemmy.world 5 points 2 weeks ago (2 children)

I don't know how much so practically, but it perseveres at least in tongue in cheek references to "putting on your whiskey jacket"

load more comments (2 replies)
[–] Kolanaki@pawb.social 38 points 2 weeks ago (5 children)

Drinking your own pee will end up dehydrating you faster, contrary to how confident Bear Grylls is in it being a decent strategy.

[–] finallymadeanaccount@lemmy.world 27 points 2 weeks ago

I think Bear Grylls has a fetish and managed to fool people into thinking it was a survival skill.

[–] Chozo@fedia.io 7 points 2 weeks ago (1 children)

I think even Bear admits that it should be an absolute last resort. Like a "well I'm like 99% sure I'm dying in the next ten minutes, why not?" sort of situation.

[–] Kolanaki@pawb.social 24 points 2 weeks ago (1 children)

So I'm gonna die anyway, but with the taste of piss in my mouth? Fuck that.

[–] HubertManne@piefed.social 15 points 2 weeks ago (2 children)

soooo. your not going to finish yours?

load more comments (2 replies)
load more comments (3 replies)
[–] Widdershins@lemmy.world 14 points 2 weeks ago (3 children)

PCP makes you better at fighting cops

[–] Tollana1234567@lemmy.today 8 points 2 weeks ago (1 children)

it makes you stronger too.

load more comments (1 replies)
[–] lol_idk@piefed.social 6 points 2 weeks ago

Well it's not wrong, but it will get you killed

load more comments (1 replies)
[–] winni@piefed.social 11 points 2 weeks ago

ask AI slop for advise

[–] lucg@lemmy.world 5 points 2 weeks ago* (last edited 2 weeks ago)

TL;DR: If you post here, please emphasise the true text, e.g. put that up front!

I've noticed that I don't remember text literally, so if a post says "the sky isn't green" then I might tomorrow remember having read something about the sky and green but was this the correction or was this the myth? Was it even in the myths thread or did I read it elsewhere?

Better for me to read only true things, e.g.: "the sky is blue, don't believe the myth about a different color". Or mention the myth is in a spoiler tag or elsewhere in the text where it doesn't act like the headline or main takeaway

Apparently most people have this, see e.g.: https://online.ucpress.edu/collabra/article/6/1/38/114468/Repetition-Increases-Perceived-Truth-Even-for

load more comments
view more: next ›