Scientists believe men once had small spines on their genitalia such as those found in chimpanzees, cats and mice. Analysis of the genomes of humans, chimpanzees and macaques indicates that a DNA sequence thought to play a role in the production of these spines have been deleted in humans, but has been preserved in other primates. It suggests another genetic deletion may have led to the expansion of specific regions of the human brain. The study is in the journal Nature. They compared the human genome with those of the chimpanzee and macaque, and came up with stretches of DNA that have been conserved in our primate relatives but deleted in humans.
How man 'lost his penile spines'
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A barb from the stingray's tail hooked onto his genitals and was still attached when emergency services reached him. The man was left rolling around on the sand in pain after the animal's barb hooked onto his genitals. When he crawled back onto the beach in Sanya in China's Hainan province, the stingray was still attached. The man was visiting the area as a tourist and enjoying the tropical weather when the freak incident happened on September 1. However they didn't have the appropriate tools to hand, so they had to improvise to fully remove and unhook the spiny tail from the man's penis. Onlookers crowded around him to watch events unfold, and some bystanders had their smartphones out to film or take pictures of the unfortunate incident.
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