One early winter evening in 1824, English naturalist and theologian William Buckland rose to address the Geological Society of London. Anticipation filled the room. Buckland was known for his ...

The shift from lizard-like sprawl to upright walking in mammals wasn’t a smooth climb up the evolutionary ladder. Instead, it was a messy saga full of unexpected detours. Using new bone-mapping tech, ...

A tiny, furry-tailed creature is the most complete picture yet as to what the ancestor of mice, elephants, lions, tigers, bears, whales, bats and humans once looked like, researchers say. These new ...

Some Mammal Traits Show Up a Lot Earlier and in Things That Weren’t Mammals at All. Lots of the traits we think of as defining us as mammals show up pretty early, during the time of the dinosaurs. And ...