At first glance, this mammal looks like a horse gone terribly wrong. But, in reality, Chalicotherium is far from a botched ...

For the Smithsonian National Zoo and Conservation Biology Institute (NZCBI), Christmas came early in 2025. Zookeepers were ...

Two sloth bear cubs were born at the Smithsonian’s National Zoo and Conservation Biology Institute (NZCBI) on December ...

Sloths, the world's slowest mammals, have evolved over 64 million years into a species that thrives throughout Central America and northern South America, but climate change and human sprawl could be ...

The Smithsonian’s National Zoo and Conservation Biology Institute (NZCBI) announced Jan. 6 that two sloth bear cubs were born ...

If you are searching for a heartfelt gift for animal lovers on Valentine's Day, the Saint Louis Zoo may be the place to go.

Sloths have been depicted as the slowest-moving mammals in the world, and have been stuck with that reputation. However, sloths are amazing animals. They may seem innocent and defenseless, but sloths ...

A pair of sloth bear cubs were born at Smithsonian's National Zoo last month, on Dec. 7, the zoo shared in a press release.

One Dec. 21, Lorenzo was found “poorly responsive” and was taken to the zoo’s L3 Harris Animal Care Center for an examination. It was found he had a declining body condition along with dehydration and ...

A sloth scientist, her tree-climbing BFF, and their dog work to save Costa Rica’s sloth populations in groundbreaking ways, all while capturing rarely seen wild sloth behaviors and reimagining what it ...