'Nullius in verba', the Royal Society's motto, roughly translated, means 'take nobody's word for it'. Why not do the experiment for yourself and see the reality of nature. Don't trust authority - trust nature. Does cranberry juice cure urinary tract infections? Is the hookah really a safer way to smoke? Will the Large Hadron Collider destroy the Earth and the Universe? Is the purpose of the peacock's tail to attract females? And in the unlikely event of a plane crash, are some seats safer than others? the human hand has 27 bones; Uranus has 27 moons; 27 is a perfect cube, being 3 x 3 x 3; and in this, Dr Karl's 27th book, he takes us on another exploration of the dazzling world of science.