Just when you thought humans couldn't be any more perfect, you learn there is an artery in the forearm that disappears during the very early stages of development.  Recently it as been found to stick around through adulthood in about a third of a group of Australians studied by Teghan Lucas, Jaliya Kumaratilake, and Maciej Henneberg.  They were able to find (based on the existence of a similar study done in the late 1800s) that there is a significant increase in the prevalence of this artery in some adults over 50.  Many instances of evolution (such as allergies) have been noted among geographically distinct groups, but this kind of physical difference is uncommon.  What does this all mean?  Here's one take:

Dr. Schumpert says, "this article seems to be demonstrating the effect of the industrial revolution, and it's requirement of greater manual dexterity, among humans.  One has to wonder if this finding is true throughout humanity, or only in Australia, where the study was done."

Looking for the full article?
Lucas T, Kumaratilake J, Henneberg M Recently increased prevalence of the human median artery of the forearm: A microevolutionary change. J Anat. 2020 Oct;237(4):623-631.