'Science is the great antidote to the poison of enthusiasm and superstition.' - Adam Smith, The Wealth of Nations, 776 Columbus never set foot in America. Piranhas are the deadliest fish. A purring cat is a happy cat. Cleopatra was insanely beautiful. All natural products are safe. Oranges are the richest source of vitamin C. You can tell a liar just by looking in their eyes. The Roswell alien autopsy proved that intelligent aliens visited us. And Dr Karl wears a hoodie lab coat to work every day. Some of these are true and some are not. Well, the last one is definitely not. But inside these covers you'll find out whether there's dis information about the other wikkid myths . Dr Karl Kruszelnicki is the Julius Sumner Miller Fellow at the University of Sydney. He appears on Triple J and other ABC radio stations, and on BBC radio, and is a regular guest of Kochie and Mel on Channel 7's Sunrise. This is his 24th book, and is based on his popular Good Weekend column, 'Mythconceptions'.