A feather found in dino poop and more...

It’s long been a mystery why one particular avian dinosaur was the only kind to survive mass extinction, but the recent discovery of a perfectly preserved fossilized feather, found in a cherry-sized piece of dinosaur poop, offers new clues.

Also today:

Why citizen scientists buried thousands of undiesHow climate change tipped the scales on a catastrophic Himalayan avalancheWhy an AI leap has left mathematicians feeling uneasyWhy scientists put teeny-tiny micro-trackers on chimney swifts

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