Mammals are the creatures that most of us mean when we say the word ‘animals’. We know them best among all other living things, for many of our pets and domestic animal are mammals and so are we.Mammals are found almost everywhere in the world, from the cold land and seas of the Arctic to hot deserts and steamy forests, and there are many different kinds. Bats can fly; whales live only in water; moles are burrowers; antelopes and horses are runners; monkeys are climbers.
The first mammals were small and evolved at about the same time as the dinosaurs, 220 million years ago. When dinosaurs became extinct, mammals became the dominant land animals. Almost all large mammals are now under threat of extinction mainly because of the activities of human beings.
Mammals