Science & Nature: The Massive Skeleton Of The African __________ Accounts For About 15 Percent Of The Body Weight, Just As In A Man Of Slender Build: However, The Elephant's Skeleton Supports As Much As Four Tons Per Leg, And Is Thus Stressed Close To The Physical Limit For Bone. To Keep From Damaging Its Skeleton, An African __________ Has To Move Sedately, Never Jumping Or Running. The 'Charge' Of These Animals Is A Fast Walk On Long Legs, At About 15 Miles Per Hour