Why don’t zebras get ulcers–or heart disease, diabetes and other chronic diseases–when people do? In a fascinating look at the science of stress, biologist Robert Sapolsky presents an intriguing case, that people develop such diseases partly because our bodies aren’t designed for the constant stresses of a modern-day life–like sitting in daily traffic jams or growing up in poverty. Rather, they seem more built for the kind of short-term stress faced by a zebra–like outrunning a lion. Why Zebras Don’t Get Ulcers on Amazon