This is the story of the "Poo Pile Mystery."

The 2-week-old piglets, born to mom Fig, aren't like ordinary pigs. Sulawesi babirusas are also called “pig deer” since males have odd-looking upper tusks that grow right through the top of their snout.

The Attwater's Prairie-Chicken may be the most endangered bird in North America, with very few left in the wild, but a conservation program at the Houston Zoo is working hard to ensure they don't go extinct.

The older female kangaroo was starting to move slower than others kangaroos in her mob, so keepers did a scan and discovered she had injured her spine.

This is the story of the "Poo Pile Mystery."

Icy treats help staff at the Maryland Zoo keep their residents cool in warmer weather.

The Saint Louis Zoo is raising Ozark Hellbenders, which grow up to about two feet long, all the way from eggs until they are ready to be released into the wild.

The Saint Louis Zoo is raising Ozark Hellbenders, which grow up to about two feet long, all the way from eggs until they are ready to be released into the wild.

The Attwater's Prairie-Chicken may be the most endangered bird in North America, with very few left in the wild, but a conservation program at the Houston Zoo is working hard to ensure they don't go extinct.

An older female kangaroo was starting to move slower than others in her mob, so keepers did a scan and discovered she had injured her spine.

Ever wondered what it's like to take care of baby animals for a living? This might be the most fun job in the world.

The zoo is celebrating its 100-year anniversary in a big way.

Ever wondered what it's like to take care of baby animals for a living? This might be the most fun job in the world.

The San Diego Zoo celebrated its 100-year anniversary in a big way.

The older female kangaroo was starting to move slower than others kangaroos in her mob, so keepers did a scan and discovered she had injured her spine.

Making sure animals stay healthy is a top priority at Utah's Hogle Zoo. Sometimes, that can be a real challenge.

See what tricks zookeepers employ to keep a giraffe calf focused on his bottle.

Positive reinforcement helps to build a positive relationship between an animal and its keeper. But sometimes, it's not so easy.

See the creative ways keepers at the Maryland Zoo keep their residents cool in warmer weather.

Follow along with lead mammal keeper Lissa McCaffree as she attempts to bottle-feed giraffe calf Baridi.

See what goes into preparing a cheetah's diet and what it's like to train a cheetah.

The Saint Louis Zoo is raising Ozark Hellbenders, which grow up to about two feet long, all the way from eggs until they are ready to be released into the wild.

Ever wondered what it's like to take care of baby animals for a living? This might be the most fun job in the world.

The zoo celebrated its 100-year anniversary in a big way.