The Cambrian Explosion is a landmark moment in the history of life on Earth when many of the major groups of animals first ...

Long before the first dinosaur hatched, Earth's ancient life was already thriving. There were bizarre sea creatures and lumbering plant-eaters that ruled prehistoric landscapes for hundreds of ...

California has its share of spiders, but which ones are dangerous? Here are 10 common brown spiders in California.

A new fossil study reveals that teeth began as skin sensors, helping explain why modern teeth still react painfully to cold ...