From a celebrated team comes a fascinating look at why we don t have super powers (alas) and why size matters, for creatures big and small. Did you ever wonder why there are no high-fl ying, wall-climbing, tall-building-leaping superheroes in real life? Find out what keeps big animals (like us) from engaging in astonishing feats of strength and agility, and yet why being tiny and all-powerful might have a downside. What if you could lift fi fty times...