Pygmies stay short to live longer

human population groups come in different heights. In India and China, people are usually short. In Canada, they are relatively taller. One school of biologists says this is due to varying food availability. A recent study of pygmies, the short bush-dwelling people of central Africa, says the reason might lie elsewhere: over centuries, their bodies have learned to remain small to divert nutrition towards reproduction. But why have their bodies learned to strike this compromise?

The answer lies in the low life expectancy of pygmies