Offers readers a captivating look into UFOs and questions whether aliens exist, complete with vivid photographs and exciting diagrams. Back matter includes an in-depth 'Out of This World' feature that highlights a related topic, a phonetic glossary, resources for further study, and an index. Outer space is full of wonder and mystery. Is there life beyond Earth? What is a comet made of? Young readers will enjoy blasting into space with this exciting,...

Introduces the basics of flight to readers with very simple explanations of why birds, planes, and rockets are able to fly.

"Describes how long-term exposure to outer space affects the human body and what scientists are doing to combat it"-- Provided by publisher.