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The pelican was a tool used to extract teeth in the 16th century. If used without care, it could break the patients jaw. From dentists to insects to bacteria, this series tackles some of lifes more unpleasant experiencesand explores how much worse it might be if they didnt exist. Each title is a blend of history and science, explaining how things work and revealing how humans have come to terms with all the challenges that nature has thrown at us! Key Features Full-color cartoon-style illustrations that make the books fun and attractive to reluctant readers A simple timeline providing an easily understood history of the subject Top Tips offer helpful advice on what you should or shouldnt do in a tricky situation How It Works callouts explain the science behind the technology You Can Do It! callouts describe a simple, safe experiment, or an action you can take to help make the world a better place A helpful glossary and index in each book ,.