"This book explains the science behind all the machines, gadgets, systems, and processes we take for granted. The perfect book for techies--young or old, male or female--who read Popular Science and Wired or watch "How It Works" and "How It's Made."

Celebrated National Geographic photojournalist Sartore continues his Photo Ark quest, photographing species around the world that are escaping extinction thanks to human efforts. The animals featured in these pages are either destined for extinction or already extinct in the wild but still alive today, thanks to dedication of a heroic group committed to their continued survival.l.

Whether you are studying for a test at school of just seeking to expand you knowledge of the world, you'll find this to be an invaluable tool.

Shares the answers to over one thousand questions on such topics as animals, natural resources, technology, and history.

Provides pictures and brief facts about a variety of different kinds of dinosaurs.

This book of photography represents National Geographic's Photo Ark, a major cross-platform initiative and lifelong project by photographer Joel Sartore to make portraits of the world's animals -- especially those that are endangered. His message: to know these animals is to save them. Sartore intends to photograph every animal in captivity in the world. He is circling the globe, visiting zoos and wildlife rescue centers to create studio portraits of 12,000 species, with an emphasis on those facing extinction. He has photographed more than 6,000 already and now, thanks to a multi-year partnership with National Geographic, he may reach his goal. This book showcases his animal portraits: from tiny to mammoth, from the Florida grasshopper sparrow to the greater one-horned rhinoceros. Paired with the prose of veteran wildlife writer Douglas Chadwick, this book presents an argument for saving all the species of our planet.