There are many many more things that nobody knows! Why do we have five fingers? Do animals have a sense of humour? Did the universe have a beginning? What causes dejà vu? Why do cats purr? How fast did dinosaurs move? In Even More Things That Nobody Knows William Hartston once again explores the limits of human knowledge revealing 501 further mysteries in subjects as diverse as cosmology mathematics animal behaviour medical science music art language & literature From the trivial to the profound this is an enthralling & enlightening investigation into the things we just don&t know & which lurk tantalizingly beyond the bounds of our understanding