There's a group trying to save the functionally extinct northern white rhino using in vitro fertilization. But the ethics around using assisted reproductive technologies to save endangered animals are far from simple.

Unicorns may be mythical creatures, but they're very plausible-seeming ones. So why hasn't evolution gifted us with magical horses with horns? Let's take a look at the genetics and developmental biology of headgear in ruminants and other...

It arose from rhino ancestors that were a lot smaller, but Paraceratherium would take a different evolutionary path. Believe it or not, it actually became so big that it probably got close to what scientists think might be the actual...

Featuring Emily of The Brain Scoop ( / thebrainscoop ) and Cas the Arctic Fox! We decided it would be cool to have guests come into the studio and talk about science with Hank.

What has tough skin, a tiny tail, and a big horn on its nose? A rhino! Join Jessi and Squeaks and learn all about these super cool, super strong animals!

Scientists were able to get molecular information from 1.7 million years old teeth using a new method that could completely change how we study extinct organisms.

We decided it would be cool to have guests come into the studio and talk about science with Hank.

Unicorns may not exist on this planet, but Earth does have plenty of one-horned creatures that are just as remarkable, if not quite as majestic.

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In the savannahs of Kenya, two female northern white rhinos, Nájin and Fatu, munch contentedly on grass. They are the last two known northern white rhinos left on Earth. Their species is functionally extinct— without a male, they can't...

Howcast - Learn where to see strippers in Las Vegas from Sin City expert Mike Myers in this Howcast video.

See what brought this unlikely pair together.

This newborn rhino doesn't know it yet, but its existence is very important. Yair Ben-Dor has more.

Follow along with a rhino keeper as she takes you on a tour of a one-of-a-kind, 1,800-acre exhibit recreating the African and Asian savannas.

Most diets that are fed to rhinos at zoos are associated with low fertility. Here's how scientists are fixing that.

Most diets that are fed to rhinos at zoos are associated with low fertility. Here's how scientists are fixing that.

Follow his journey from San Diego Zoo to a protected wildlife reserve in Africa, where he'll meet a potential mate.

Her birth is significant due to the southern white rhino's endangered status.

See what brought this unlikely pair together.

This baby rhino is getting a grand tour of the San Diego Zoo Safari Park's 40-acre field enclosure - and there's no obstacle she can't handle.

Most diets that are fed to rhinos at zoos are associated with low fertility. Here's how scientists are fixing that.

Follow his journey from San Diego Zoo to a protected wildlife reserve in Africa, where he'll meet a potential mate.

Her name means "joyful," and so far she's living up to it.

If he were out in the field with his mother, he'd be running around all day long trying to catch up with her. So, zookeepers have to simulate that with plenty of exercise.

Every rhino calf born is important to the population.