Scientists are starting to understand more about the small heart muscle fibers that Da Vinci showed in his illustrations over ...

Above the shores of prehistoric seas and lakes, pterosaurs roamed the skies. They were feathered creatures that ranged in ...

Fossil collectors in Florida have discovered an ancient sinkhole, now at the bottom of a river, which holds the remains of animals rarely seen in the state, including a type of giant armadillo, giant ...

The female reproductive system includes internal and external organs, each designed to carry out varying functions. Learn more about the anatomy of this system.

Cats are one of the most captivating creatures in the animal kingdom. They are graceful yet incredible hunters, seemingly ...