Which animal swims the fastest? Who has the most acute sense of smell? Which is the smallest mammal? Who lays the largest egg? Discover the weirdest and most wonderful creatures ever to have lived on Earth with this riveting family reference. The book includes world record holders from each of the main animal groups including mammals, reptiles, birds and insects, with intriguing stories and fascinating facts throughout. There are also special features that highlight the superstars of the animal kingdom - the blue whale is not only the heaviest and longest animal on Earth but has the largest babies, the biggest appetite and makes the loudest noise! Find out which mammal can boast a top-selling record in the pop charts, who built a nest that weighed nearly three tonnes, and which dinosaur made the world's largest footprint. With stunning photographs and all the latest discoveries, this up-to-date and accessible book will enthrall and astound both children and adults alike.