Purgatorius, a kind of mammal called a plesiadapiform, might've been one of your earliest ancestors. But how did we get from a mouse-sized creature that looked more like a squirrel than a monkey -- to you, a member of Homo sapiens?

Scientists have put the human gene MCPH1 (which plays a role in brain development) into monkey embryos through a virus that contained the gene. Sounds like a movie, right?

Howcast - Learn what a teacup pig is from the animal experts at traveling petting zoo Squeals on Wheels in this Howcast video.

Howcast - Learn how to sing the classic kid's song 5 Little Monkeys with this Howcast video.

Howcast - Learn how to say "zoo" in French with this online French lesson from Howcast.

The species practices 'alloparenting,' which means every family members participates in raising the infant.

In this video, the host explores the hidden gems of Saint Kitts and Nevis, the smallest nation in the Americas. From drunken monkeys to unique geography, the country's rich history and vibrant culture are showcased in an engaging and...

Learn how zookeepers use enrichment to encourage species-specific behaviors, and why it's so important.

Welcome to Monkey Village, one of the only places in the U.S. where you can walk right through the monkeys' habitat.

Meet 3-week-old Kupatwa, the newest member of this Schmidt's Guenon troop, and his mom Bebe.

Meet Gabi and Chewy, two of San Diego Zoo's more interesting monkeys.

Capuchin monkeys have the largest brains of all New World monkeys. Meet all the members of this group and learn what their roles are.

3-week-old Kupatwa and first-time mom Bebe are inseparable.

Learn how zookeepers use enrichment to encourage species-specific behaviors, and why it's so important.

Welcome to Monkey Village, one of the only places in the U.S. where you can walk right through the monkeys' habitat.

Why this is uncharted territory for zookeepers.

Meet Gabi and Chewy, two of San Diego Zoo's more interesting monkeys.

Animals in the Ituri forest at San Diego Zoo get fall-themed enrichment treats.

The species practices 'alloparenting,' which means every family members participates in raising the infant.

Learn how zookeepers use enrichment to encourage species-specific behaviors, and why it's so important.

Ebony is one of Utah Hogle Zoo's oldest residents.

Welcome to Monkey Village, one of the only places in the U.S. where you can walk right through the monkeys' habitat.

They make look alike, but based on personality they're pretty easy to tell apart.

Learn how zookeepers use enrichment to encourage species-specific behaviors, and why it's so important.