The dinosaurs were not in decline before the asteroid hit, a new study finds. Instead, poor fossilization conditions and unexposed late Cretaceous rock layers mean they're either not preserved or…

In the book "Adaptable," evolutionary anthropologist Herman Pontzer explores human biology and development, and how people have evolved to survive everywhere on Earth.

NASA's Curiosity Rover has discovered long carbon chains on Mars. On Earth, molecules like these are overwhelmingly produced by biological processes.