![]() 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. (Source: Daily Mail) Hairless Kangaroo This tiny creature is Sabrina, a female kangaroo who was abandoned by her mother at the Serengeti-Park in Germany. However, this hairless baboon was spotted in the wild, so the cause of its baldness is unknown. So the figures quoted by primate experts are a little exaggerated. The animal might have lost its hair due to alopecia. AN orangutan forced into prostitution was so traumatised by being repeatedly raped that she screamed and defecated whenever her former madam visited her in rehab.
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