The World of Mammals
A mammal is an animal that feeds its babies with milk when it is young. There are over 4,500 types of mammals.
Biology
The Human Heart
The human heart is a muscle that lies on the left of the chest. It is about the size of a fist. The heart is like a pump that sends blood around your body.
Endangered Species
An endangered species is a plant or an animal that faces a high risk of disappearing forever. Sometimes this happens because they have lost their natural habitat, at other times humans are the cause for such species becoming extinct.
Coffee
Coffee is one of the most popular hot drinks in the world. Almost a third of the world’s population drinks coffee.