A fossilized feather pulled from 66-million-year-old dinosaur dung in Montana is helping scientists answer one of the biggest questions in paleontology: why did birds survive the asteroid impact that wiped out most dinosaurs? Researchers at the Field Museum in Chicago studied the feather along with fish scales and leg bones from a hesperornithiform, an extinct diving bird. It’s the first feather ever found from that group.
The study, published in Current Biology, suggests the answer might come down to insulation. The extinct divers had a mix of modern waterproof feathers and primitive, fuzzy body feathers. Those older feathers may not have kept them warm enough through the long, dark winter that followed the asteroid impact. The Neornithes, the only bird group that survived, likely had more efficient plumage, which is why every bird you see today traces back to them.
There’s a bigger lesson tucked in here too. This fossil sat in a collection for years before anyone studied what was inside. Museum collections hold answers to questions we haven’t even thought to ask yet. So what’s your take: does it surprise you that staying warm was the difference between making it and not making it?
About the Author
Andrew Johnson
Andrew Johnson is a contributor to LocalBeat, covering local news and community stories.
