A new species just turned up in an Australian cave. It has teeth, claws, and a see-through body.

A newly discovered deep-sea creature has become an unlikely Internet star. After appearing in a popular YouTube video, a rare chiton found nearly three miles beneath the ocean surface sparked a global ...

Across the United States, a quiet biological invasion is reshaping ecosystems, straining farms and fisheries, and forcing officials into a costly game of catch-up. Scientists now warn that a growing ...