If the age of Earth was scaled to 24 hours, humans would only have come into existence in the last second. Twenty-two minutes ago, a meteorite hit Mexico's Yucatan Peninsula, wiping out (almost) all dinosaurs. Across the eons, Earth has been home to forest-dwelling mega-penguins, mile-high waterfalls in the Mediterranean, humongous glass sponge reefs, and many other fascinating sights. This book provides snapshots of the most wonder-filled moments from our planet's vast history, as well as the science and geography that created them. Written by an expert paleontologist, each snapshot of another world is accompanied by awe-inspiring illustrations, maps of the ever-moving continents, and photos of comparable contemporary phenomena. So dive back into deep time, and unlock the secrets of our planet's past.