How could the tiny parts of the ear adapt independently to the diverse functional and environmental regimes encountered in mammals? A group of researchers proposed a new explanation for this puzzle.

The first warm-blooded animals appeared abruptly 233 million years ago, according to clues hidden deep inside their ears. Before now, scientists estimated that warm-bloodedness, or endothermy, ...

Human evolution is often told as a tidy story of adaptation, yet some of our most familiar body parts still defy straightforward explanation. From the jut of the human chin to the curve of the outer ...