When Do Fish Sleep? (Imponderables)

Why are tennis balls fuzzy? Why don't birds don't tip over when they sleep on telephone wires? What makes yawning contagious? Why, oh why, do roosters have to crow so early in the morning? Pop-culture guru David Feldman demystifies these topics and so much more in When Do Fish Sleep? - the unchallenged source of answers to civilization's most baffling questions.