"Questions and answers." . . . . . . . . . "Answers questions on a variety of scientific topics, including \"Who eats more than his own weight in one day?\" and \"Who buries his head in the sand in time of danger?\"" . . . "Why?" . . "Answers questions on a variety of scientific topics, including \"Why do birds sing?\" and \"Why doesn't ocean water spill over into space?\"" . "Who?" . . .