Science ScholarJan 18
Human Arms Keep Growing an Extra Artery, And Here's Why https://www.sciencealert.com/human-arms-keep-growing-an-extra-artery-and-heres-why #science
Human Arms Keep Growing an Extra Artery, And Here's Why

Picturing how our species might appear in the far future often invites wild speculation over stand-out features such as height, brain size, and skin complexion. Yet subtle shifts in our anatomy today demonstrate how unpredictable evolution can be.

ScienceAlert
Show threadRhyothemis

@ScienceScholar

Why are the researchers assuming this is an evolutionary change? Not every physical change over generations is due to a change in gene frequencies.

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Another interesting change:

Decreasing human body temperature in the United States since the industrial revolution
https://doi.org/10.7554/eLife.49555

#biology #anatomy #physiology #vasculature
#thermoregulation

Decreasing human body temperature in the United States since the Industrial Revolution

Since the Industrial Revolution, normal body temperature in both men and women has decreased monotonically by 0.03°C per birth decade.

eLife
Jan 18 at 5:01pmWeb