A pair of critically endangered, nearly 100-year-old Galapagos tortoises at the Philadelphia Zoo have become first-time ...

Many families enjoy an outing to the zoo on a warm summer day. People have been fascinated with exotic animals since ancient ...

The dire wolf once roamed an American range that extended as far south as Venezuela and as far north as Canada, but not a ...

Researchers collected images of 445 different species and the data could redefine how some animals are classified.

Joel Sartore's Photo Ark project, funded by National Geographic, captures stunning images of over 18,000 animal species.