![]() ![]() Chimpanzees and all other nonhuman primates have only the working version in other words, they’re on the powerful, “sprinter” end of the spectrum. People with two working versions of this gene are overrepresented among elite sprinters while those with the nonworking version are overrepresented among endurance runners. (Puny jaws have marked our lineage for as least 2 million years.) Many people have also lost another muscle-related gene called ACTN3. One gene, for example, called MYH16, contributes to the development of large jaw muscles in other apes. In the past few years, geneticists have identified the loci for some of these anatomical differences. A chimpanzee’s skeletal muscle has longer fibers than the human equivalent and can generate twice the work output over a wider range of motion. ![]() But a more important factor seems to be the structure of the muscles themselves. How did we get to be the weaklings of the primate order? Our overall body architecture makes a difference: Even though chimpanzees weigh less than humans, more of their mass is concentrated in their powerful arms. But it is a fact that chimpanzees and other apes are stronger than humans. The reality is that chimps are quite strong, but they do not surpass the strength of an adult man by much, at most they could have similar strength or 15 more pulling power than. So the figures quoted by primate experts are a little exaggerated. Previously, it was said that a chimp could be up to four times stronger than a man, but this information was disproved after several studies of monkey muscle tissue. So he packed up a device used to measure pull strength, called a dynamometer, and set out for the Bronx Zoo. Due to the almost identical genome composition of humans and chimpanzees, there is an emergent need for defining the new role of chimpanzee modeling in comparative medicine. Poe’s story of the scalp-pulling orangutan struck Bauman as being “ grotesquely impossible.” In 1923, he noted that every expert in the field believed apes were vastly stronger than humans-yet none had ever tried to prove it. These results demonstrate that ChDPSCs can be efficiently isolated from post-mortem teeth of adult chimpanzees and are multipotent. The suspicious claim seems to have originated in a flapper-era study conducted by a biologist named John Bauman. It’s just the sort of factoid the zoo staff might tell you to keep you from knocking on the glass. If the “five to eight times” figure were true, that would make a large chimpanzee capable of bench-pressing 1 ton. This study is the most extensive documentation to date of a modern adult chimpanzee skull exhibiting tooth marks by a large mammal, thus providing new evidence to help identify and interpret other events of predation and scavenging of largebodied apes in the modern and fossil records. Consider that a large human can bench-press 250 pounds. But it sounds extreme to suggest that humans are only an eighth as strong as chimpanzees. A chimp on four legs can easily outrun a world-class human sprinter. Their climbing lifestyle accentuates the need for arm strength. Pulled scalps? Unstuck wagons? No doubt, chimpanzees are different from us. ![]()
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