Frozen squirrel poop hints at sights and smells of Ice Age ecosystems
DNA preserved in ancient scat reveals what Yukon ground squirrels ate and what animals shared their world.
DNA preserved in ancient scat reveals what Yukon ground squirrels ate and what animals shared their world.
We summarize the week's scientific breakthroughs every Thursday.
During courtship, male scissor-tailed nightjars crack their wings together to make a sharp snapping sound. It's the result of colliding arm bones.