"Nicola Davies is the best thing to happen to biology classes since the invention of the filmstrip." --Bulletin of the Center for Children's Books (starred review)

Did you ever wonder why there are no high-flying superheroes in real life? Find out what keeps big animals (like us) from performing amazing feats of strength and agility, yet why being tiny and powerful might have a downside. What if you could lift fifty times your weight (hello, ant), but getting wet could kill you? Or you could soar like a bird, but a cold breeze would do you in? From an award-winning duo, an intriguing look at what it means to be just the right size. Back matter includes an index and a glossary.