Increasing Occurrence of an Extra Arm Artery Shows We’re Still Evolving

By: | October 13th, 2020

Image courtesy Wikimedia

The recent discovery of an extra arm artery in modern humans suggests that human evolution is not over. Australian researchers identified this feature that is actively evolving in the human forearm.

Scientists revealed that the median artery that temporarily runs down the center of our forearms while in the womb is not vanishing as it used to. 

The median artery in an unborn baby is the main vessel that supplies blood to the human forearm and hand. But shortly after birth, most people’s median artery typically disappears once two other arteries develop.

As per the study published in the Journal of Anatomy, an increasing number of adults have retained all three arteries.

Study coauthor Teghan Lucas, said, “Since the 18th century, anatomists have been studying the prevalence of this artery in adults and our study shows it’s clearly increasing,” 

According to scientists, presently this microevolutionary change in the human body’s anatomy is in 35% of people. They foresee that predict that if the trend continues, people born 80 years from now will all carry this artery.

Lucas added, “If this trend continues, a majority of people will have median artery of the forearm by 2100.”

Nidhi Goyal

Nidhi is a gold medalist Post Graduate in Atmospheric and Oceanic Sciences.

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