Mammals include humans and all other animals that are warm-blooded vertebrates (vertebrates have backbones) with hair. They feed their young with milk and have a more well-developed …

From animals to geography, take a look at these amazing—and slightly strange—facts about our world.

Common Name: Giraffe Scientific Name: Giraffa camelopardalis Type: Mammals Diet: Herbivore Average Life Span In The Wild: 25 years Size: 14 to 19 feet

Common Name: Koala Scientific Name: Phascolarctos cinereus Type: Mammals Diet: Herbivore Average Life Span In The Wild: 20 years Size: 23.5 to 33.5 inches

African Elephant African elephants can live up to 70 years! Learn more amazing facts about the African elephant with National Geographic Kids.

By Avery Hurt Common Name: Arctic foxes Scientific Name: Vulpes lagopus Type: Mammals Diet: Omnivore Group Name: Skulk, leash Average Life Span In The Wild: 3 to 6 years

Scientists think these fascinating creatures are the earliest relatives of modern mammals. Recent studies show that they first evolved more than 112 million years ago, well before the extinction …

Very social and playful mammals, bottlenose dolphins form friendships that last decades hunting, mating and protecting each other. They like to surf in the waves and wakes of boats and swim …

Fastest mammal on land, the cheetah can reach speeds of 60 or perhaps even 70 miles (97 or 113 kilometers) an hour over short distances. It usually chases its prey at only about half that …

Common Name: Plains zebras Scientific Name: Equus quagga Type: Mammals Diet: Herbivore Group Name: Herd Average Life Span In The Wild: 25 years