Set off on a journey of discovery in this beautiful photographic celebration of the natural world. From firefly squid glowing against the night sky in Japan to a Mexican cave filled with the largest crystals ever found, you'll discover the stories and science behind these wonders, the threats they now face and the efforts to save them. How did the Grand Canyon come to be? Where is the most electric place on Earth? And what can we do to protect the Great Barrier Reef?