My goat comic panel of all time right here. It's got it all, dinos, end of the world, depression, acceptance, fatalism, mystery, multi-species suicide!
And the world building! They're this advanced race, able to control the entire cosmos?! And they choose to remain on the planet and die by their own hands? Why? What led to this being the end, and them not only choosing this end but embracing it with open arms. I want to know more, but prefer to remain teased.