An endodontist who normally operates on humans was part of the large team that performed the root canal on the fully sedated ...

A capybara and a howler monkey at the Denver Zoo have defied animal norms to become best friends and snuggle buddies.

Goldfish stir up lake bottoms, releasing phosphorus that fuels algae blooms and clouds the water. But now, they're on the menu for bears, otters and sea lions at the Zoo.

From a polar bear getting its teeth checked, to a passenger going risking it all to make their train, here are some crazy moments that were caught on camera.

Kova, a playful polar bear at an Alaska zoo was having tooth trouble, so her keepers arranged for a root canal; no small feat ...