@AThousandYoung saidOK, but how did our furry precursors get their Vitamin D before they lost their fur?
A hominid that needs to absorb sunlight to produce Vitamin D.
@Arkturos saidGoogle is your friend:
OK, but how did our furry precursors get their Vitamin D before they lost their fur?
"When early human ancestors were covered in thick body hair, they obtained vitamin D primarily through exposure to high-intensity equatorial sunlight, which was strong enough to penetrate hair, and via dietary sources. Their lifestyle and environment offered natural solutions to the challenges of vitamin D synthesis.
Here is how hairy ancestors likely obtained sufficient vitamin D:
1. High-Intensity Tropical Sun (UVB Radiation)
Our earliest ancestors lived in Africa, where the sun's ultraviolet B (UVB) radiation is intense year-round.
Penetration: Even with body hair, enough UVB radiation reaches the skin to trigger vitamin D3 synthesis in the epidermis.
Minimal Coverage Needed: In the tropics, a relatively small amount of skin exposure to direct sunlight is enough for the body to produce sufficient Vitamin D."
The list continues with diet etc but too much to post here.
@Martin saidI wonder if you and Very Rusty might have been separated at birth. 😉
Google is your friend:
"When early human ancestors were covered in thick body hair, they obtained vitamin D primarily through exposure to high-intensity equatorial sunlight, which was strong enough to penetrate hair, and via dietary sources. Their lifestyle and environment offered natural solutions to the challenges of vitamin D synthesis.
Here is how hairy ancestors like ...[text shortened]... ody to produce sufficient Vitamin D."
The list continues with diet etc but too much to post here.
@Arkturos saidThere was a compensatory increase in melanin. Then when humans went north they lost the melanin and went back to light skin. Here's a hairless chimp. Notice it is not black.
What intelligent hominid would breed for fur loss without a compensatory increase in melanin production?
https://www.facebook.com/watch/?v=1812570269167057