Why is the South Pole colder than the North Pole? Is hippo sweat really pink? What causes a meteor shower? In this intriguing deck of cards, the Experts?biologists, cosmologists, oceanographers, computer scientists, paleontologists, and the like?offer lucid, concise answers to 48 questions asked by readers of Scientific American, one of the world's finest sources of scientific and technological information made comprehensible to the nonscientist.
