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!

Most mammals give birth to live babies except for one or two like the echindea which lays eggs. Mums produce milk to feed their babies. And just like me and you, mammals breathe air with their ...

Today there are 3 sorts of mammal. A mammal is an animal that feeds its young milk. The ones that give birth to well-developed babies are called placental mammals. We are placental mammals and so ...

Like most other mammals, dolphins give birth to live young. Dolphins usually give birth to only one calf at a time. Dolphin ...

Marine mammals live most of their lives in or near water, especially oceans. Pinnipeds spend most of their time in the water, hunting for food, but they come to land to give birth, mate ...

Today, birds and crocodiles just lay eggs. But most mammals aside from the platypus and some snakes, lizards, fish, and amphibians give live birth. An examination of some of these species’ gestation ...

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

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 ...

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 ...