Why Do Humans Not Have Tails Like Monkeys? The Answer Lies In A Gene, Study Says

At a certain point in the evolutionary history of humans, their ancestors underwent a genetic change, which is one of the reasons why Homo sapiens do not have a tail.

About 25 million years ago, certain primates such as gorillas and chimpanzees evolved away from Old World Monkeys, which lived five million to 23 million years ago. That was when tail loss occurred within those primates. These were ancestors of humans

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Have you ever wondered why humans do not have tails, unlike most monkeys, and their primate ancestors? The answer lies in a gene, a new study, published in the journal Nature, has found. At a certain point in the evolutionary history of humans, their ancestors underwent a genetic change, which is one of the reasons why Homo sapiens do not have a tail. As part of the study, researchers at the NYU Grossman School of Medicine in New York compared the genetic material (deoxyribonucleic acid or DNA)