After firmly establishing himself as the world's second greatest geologist, Henry Carroll set out in search of the world's softest diamond. His epic journey took him in to the depths of the Pacific Ocean and to the iciest reaches of Siberia. Just as he was beginning to give up a freak typhoon left him marooned in the jungles of central Africa. A few days after passing his 11 plus exam, the child prodigy, Nigel Howlett decided to embark on an open-ended sabbatical in the Congo. It was during this time where he first laid eyes on the ancient rock carvings of the Wacca-Dacca tribe. Howlett spent years in the jungle decoding the Hieroglyphs, revealing that they translated into a map marking the location of a rare crystal, so soft it could be moulded in your hands. Two nights later the hand of fate intervened - lost and delirious, with no food or water, Carroll unexpectedly met Howlett. After finding the diamond and then accidentally eating it in a bizarre tribal ritual, the two embarked on a six-year journey to uncover the most extraordinary facts from around the world, which will stretch our understanding of science, history and nature to the very limit.