Tons of Mysteries "Illustrated: The Time of the Elephant and the Time of the Mouse" March 1993 Issue Text by Tatsuo Motokawa / Illustrations by Hiroshi Abe Thinking about the lives of animals from an unexpected angle We'll investigate the question, "If body size is different, how does the amount of food eaten change?" by examining the food intake of animals of various weights. If a house mouse weighing 30 grams eats 10 grams, then an elephant weighing 3 tons eats 1 ton. Next, we'll look at the number of times the heart beats in a lifetime: the house mouse's heart beats 600 times per minute, while the elephant's beats 30 times per minute. Huh...? From the accumulation of surprising facts, the way animals live becomes clear. For self-reading: Elementary to middle school students #TatsuoMotokawa #HiroshiAbe #TonsOfMysteries Stored in a box. It's old, so there's some damage to the cover, but the inside is a clean item.