What Makes a Mammal?

by Tyelle Latham, age 10

Mammals are creatures with warm blood and fur. They also feed their babies with milk that they produce themselves.
There are almost 4,500 types of mammals, and they give birth in different ways. One group of mammals is called monotremes, who lay eggs. Platypuses, another type of monotreme, lay many eggs in a burrow. The egg has nutrients that help the babies grow. The echidna, a spiny anteater, is a monotreme. Many other mammals grow their babies internally. These are called placental mammals.
Many mammals have a good sense of smell. Plant eaters, like rabbits and deer can smell if enemies are near. Some have good sight and hearing that also lets them know if predators are around.
Mammals are interesting creatures. They have unique adaptations that help them survive.

[Source: 100 Things You Should Know About Mammals ]