STANFORD, Calif. (KGO) -- If you ever come face-to-face with the wrong kind of shark, there's something you probably want to avoid. Just a hint: they're long and really sharp. But now, researchers at ...

Since the Earth began, it has been home to millions of species that modern day humans would struggle to comprehend. Throughout history, our planet has undergone five mass extinction events. An ...

Whether a species has just freshly emerged, or it has been around for millions of years does not dictate its vulnerability. This has been the assumption of an old debate on whether species' age plays ...