When we think of mammals, we usually think of animals that give birth to live babies, like lions or humans. But there’s a small and rare group of mammals that do things differently– they lay eggs!

Sago - a Hoffman's two-toed sloth - delivered her little critter on Wednesday while on exhibit in the zoo's primate building. Both mom and baby are doing great.

As it turns out, it’s easy to miss when a sloth is expecting. Something similar happened at the Hattiesburg Zoo in 2018 when ...

The belly button, or navel, is a scar that forms after the umbilical cord is detached shortly after birth. The umbilical cord ...

Allie, a 37-year-old bottlenose dolphin, has entered her third trimester of a 12-month pregnancy. She is expected to give birth in June.

But they're also pretty unusual on the inside: Female kangaroos have two vaginas — or three, if they've given birth. Why could that be? The most likely explanation is that it's an adaptation to ...

Mammals give birth to babies, reptiles pop out eggs, right? An ancient fossil unearthed in China suggests the latter wasn't always true. Paleontologists have found a 245-million-year-old fossil of ...

Sloths mate and give birth while hanging in the trees ... Three-toed sloths also have an advantage that few other mammals possess: They have extra neck vertebrae that allows them to turn their ...