You are currently not logged in. Please Sign In to continue

This story is about Han Prime Minister Cao Cao's six-year-old son, Cao Chong (196 to 208 B.C.). The theory this little boy used to weigh an elephant is similar to Archimedes' Principle (287 to 212 B.C.), which is that the weight of an object submerged in fluid is equal to the weight of the displaced fluid.