400-million-year-old evolutionary arms race helps researchers understand HIV

Major fossil study sheds new light on emergence of early animal life 540 million years ago

Genome structure of dinosaurs discovered by bird-turtle comparisons

The dark side of our genes -- healthy aging in modern times

Major shift in marine life occurred 33 million years later in the South

Worm-eating mice reveal how evolution works on islands

American tropics, Amazon origins

Jurassic fossil tail tells of missing link in crocodile family tree

Ancient skull shows early 'baleen whale' had teeth

Stone Age hepatitis B virus decoded