Look around, and you'll notice immediately that people are different. Humans vary widely in their shapes and sizes, from the barely-five-foot-tall populations in Indonesia and Bolivia to the easily-six-foot-tall folks of places like the Netherlands and Montenegro. Watch the Olympics, and you'll see diverse body types excelling at different sports: tiny bodies flying through the air in gymnastics, long bodies slicing through the water in swimming, and thick bodies hurling heavy objects through the air.