Ever wondered what compels us to choose random Lotto numbers when 1, 2, 3, 4, 5, 6 will do just as well? Or how it could be that if you went back thirty generations, your ancestors would number more than the total count of people who ever lived? Or what bits of yourself would be best to eat in order to stay alive? This follow-up to the popular science titles Why Don't Penguins' Feet Freeze? and How to Fossilize Your Hamster answers these baffling questions and many more. How much mucus does the nose produce during the average cold? And why does bottled water have a best-before date? Not so sure? Then this is the book for you.