A: In 1924, the Bronx Zoo tested the relative strength of a 165-pound man against a 165-pound chimpanzee. Using a dynamometer, which measures strength by the force of a pull on a spring, the man was able to pull 210 pounds. The chimp, on the other hand, pulled almost 900.
The lesson: Don’t mess with the apes. Pound for pound, chimpanzees are about five times stronger than humans. In fact, a human is no match for a chimpanzee, regardless of age or sex. In the same Bronx experiment, a 135-pound female chimp pulled a whopping 1,260 pounds. Scientists also estimate that, by the tender age of five, young chimpanzees are already stronger than adult humans.