The book reveals how much we've come to know about our fascinating world through the pages and unforgettable imagery of National Geographic, and taps key voices from the forefront of ocean and space exploration, climate science, archaeology, mountaineering, and many other disciplines to peer with us over the horizon and see where we are heading in the future. Organized thematically, chapters focus on major accomplishments in each of the three realms of Earth, Sea, and Sky (featured on the National Geographic flag). Author Mark Collins Jenkins will present the subject matter chronologically, focusing on great leaps forward that dramatically changed our understanding of the planet, from summiting Everest to landing on the moon to discovering Titanic. Sidebars will feature famous names including Jared Diamond, Sylvia Earle, Buzz Aldrin, Bob Ballard, Jane Goodall and more, contributing thoughts about big questions of exploration, key frontiers in research, and enduring mysteries. We'll ask beloved characters like Zahi Hawass whether or not there's anything left to be discovered in the Valley of the Kings; Paul Sereno if we'll be able to create a dinosaur from DNA; Jared Diamond when