The things that nobody knows : 501 mysteries of life, the universe and everything

HERE ARE MANY, MANY THINGS THAT NOBODY KNOWS . . . Why are so many giraffes gay?Has human evolution stopped?Where did our alphabet come from?Can robots become self-aware?Can lobsters recognize other lobsters by sight?What goes on inside a black hole?Are cell phones bad for us?Why can't we remember anything from our earliest years?Full of the mysteries of life, the universe and everything, The Things that Nobody Knows is a fascinating and unputdownable exploration of the limits of human knowledge of our planet, its history and culture, and the universe beyond.