In an interview with Discover Magazine, world-renowned primatologist Dr. Jane Goodall referred to an incident with a chimpanzee that led her to estimate his strength at eight times her own. Although Dr. Goodall is a slender woman, not a bodybuilder, most sources agree that a chimpanzee's strength, while often exaggerated, can be reasonably estimated at about three to five times that of an average man. Whether or not a chimpanzee could win a tug-of-war with a champion bodybuilder is another question. Even if one could persuade a chimpanzee to participate in such a contest, their human competitors have far greater-than-average strength themselves. Either way, it is safe to conclude that given the wide disparity in these estimates, an adult chimpanzee may be as little as twice as strong as some people, or as much as eight times as strong as others.