"Your body is an incredible machine that can run for more than 80 years without batteries, can self-propel over land and water, can heal itself from most common ailments, and can pair with another of its kind to reproduce. This updated, fully illustrated, easy-to-understand guide from National Geographic explores the intricate systems that make up the marvelous human body -- from head to toe, inside and out. Beautifully designed and brimming with...

"206 bones. One heart. Two eyes. Ten fingers. What makes tears of joy different from tears of sadness? Why is a gut feeling so much smarter than you think? And why is 90% of you not even human? You may think you know the human body--heart, lungs, brain and bones--but our bodies are full of extraordinary mysteries that science is only just beginning to understand. This book will change forever how we think about our bodies. Thanks to cutting-edge science...