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From frozen deserts to steaming jungles, our planet is amazingly rich and varied. But it is also under threat. Take a closer look at the challenges facing plane

The #1 international bestseller: An astronaut's tour of our planet from the heavens, featuring 150 mesmerizing photographs (with commentary) from the Internatio

#1 NEW YORK TIMES BEST SELLER • In this urgent, authoritative book, Bill Gates sets out a wide-ranging, practical—and accessible—plan for how the world ca

" ... Concise explanations and descriptions - easily read and readily understood - of what we know of the chain of events and processes that connect the Sun to

An extreme wildlife photographer explores the bizarre species that thrive in complete darkness with more than 200mesmerizing color photos. Deep inside caves, at