How are mammals different from other animals ? Which is the smallest mammal? Which are the only mammals with wings? How do conservation projects help to protect mammals under threat?Enter the wonderful world of mammals - animals that have been roaming the world since the time of the dinosaurs. Find out how they became the most successful group of animals on land, in the ocean and in the air. Get your teeth into some bitesize mammal facts!Fast Facts is a new series of high-interest, lower reading ability books aimed at fact-hungry children who enjoy information books but may be less confident readers or have difficulty with the usual quantity and level of text aimed at their age group.