Some birds survived the asteroid that wiped out dinosaurs. A fossilized poop can help explain why

By Katie Hunt, CNN (CNN) — Tiny feathers encased in fossilized poop are helping scientists understand why some birds made it through the mass extinction that wiped out the dinosaurs and others did not. Unearthed in Montana, the feathery find belonged to a bird that had once been devoured and excreted by a predatory dinosaur