"How fast do our bodies grow? Whats is the body's largest organ? Why do our bones bend? Discover the answers to these questions and many more. Use the grid co-ordinates to navigate around the human body. Throughout there are amazing facts and statistics, as well as website links to help you expand your knowledge. The informative text is written and checked by experts. Every topic is illustrated by detailed images, photographs, and diagrams."--Provided...

An interesting look at some of the What if questions of our younger readers.

Historians and inquisitive laymen alike love to ponder the dramatic what-ifs of history. In these never-before-published essays, some of the keenest minds of our time ask the big, tantalizing questions: Where might we be if history had not unfolded the way it did? Why, how, and when was our fortune made real? The answers are surprising, sometimes frightening, and always entertaining. This provocative collection of essays features today's foremost...

Discusses the characteristics of asteroids and what might happen if an asteroid hit the Earth.

Discusses the environmental effects of the melting of the polar ice caps.

Looks at endangered species, how human activity has contributed to their numbers, and ways in which conservationists attempt to protect them.