This story includes discussion of suicide. If you or someone you know needs help, the national suicide and crisis lifeline in ...

Animal lovers fall on both sides of this debate. We asked an expert for insight into the question, are zoos ethical?

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

A 100-year-old Galápagos tortoise at the Philadelphia Zoo has successfully sired offspring. This old reptile, making keepers ...