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 examine the question, "If body size is different, how does the amount they eat change?" by investigating 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: a house mouse's heart beats 600 times per minute, while an 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.