There are countless daring, clever and ruthless travellers and explorers from throughout history. But who was the toughest nut of all? Bursting full of entertaining and witty fact-filled text in bite sized chunks and jam-packed with hilarious full-colour illustrations throughout. From Christopher Columbus to Neil Armstrong and countless other tough-nuts, Hard Nuts of History Travellers and Explorers includes Hardometers and a Hard Nut rating for some of the toughest travellers and explorers of all time.