Over the last century and a quarter, the National Geographic brand has earned worldwide recognition, popularity and respect. This book is a celebration of achievements on the cutting edge of exploration and photography, and new reporting from the forefront of National Geographic research. Featuring show-stopping imagery and thrilling behind-the-scenes tales, it reveals how much we've come to know about our fascinating world in the past 125 years, tapping key voices at the vanguard of ocean and space exploration, climate science, archaeology, mountaineering, and many other disciplines to celebrate the spirit of discovery and peer over the horizon at worlds that remain to be explored.