Books in World of the Unknown series

Amazing and awe-inspiring, flight has always captured man's imagination. This dynamically illustrated title truly captures the excitement of flight, from the Montgolfier brothers' hot-air balloon to the latest "super jumbos" that carry up to nine hundred passengers. Readers will explore the basic principles offlight, meet aviation pioneers, discover which aircraft is the fastest, and fly into the future with amazing "space planes."

Crocodiles and Alligators of the World provides a broad overview of all 22 species of crocodilians. Among the oldest surviving vertebrates on the planet - they have been around for approximately 200 million years - these reptiles have been depicted in many different roles in the literature and legends of cultures around the world. And while many people fear these strange creatures, crocodilians have captured the imaginations of human beings as few other animals have. An expert in the field, David Alderton describes the lifestyle, zoology, distribution, and conservation of crocodiles in this readable, highly informative volume. Their fascinating evolution, from the age of the dinosaurs to the present, is presented in detail. Despite their popular image as dangerous creatures, or perhaps because of it, many crocodile and alligator species are in danger of extinction. Yet, no crocodilian species has gone extinct in the time since humans became dominant on the planet, a testament to their resilience and adaptability. This comprehensive survey of crocodiles, alligators, and caimans provides a captivating introduction to what is known about crocodilians. The text is complemented by full-