Secure transaction Read all about history's toughest hard nuts. Who were the most famous (and not-so famous) ruthless, brave, fearless and intrepid travellers and explorers from throughout history? 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.