>>29278465
Melanin absorbs the majorty of electromagnetic radiation, including heat, hence why blacks sweat much more (which is also why they are more water dependant)
And naturally the radiation involved in the synthesis of vitamind D. Blacks living in low UV radiation enviroments are highly suceptible to depression and developemental diseases,
Blacks have higher bone density because they also have lower bone volume, is a structural difference like that in birds.
Meaning the also have less bone surface for skeletal muscle mass.
compared to europeans, especially northern europeans, black have small scapular bones, small trapezoidal muscles, small scapular elevators, and in general relatively thin limbs.
Blacks are bad at strenght sports and excel at running, their backs are small too
Blacks are "long and gracile", expressed more strongly because they are adapted to heat dissipation and sun exposure (long thin limbs) while whites are stocky and big, while some in particular are also adapted to abundance (increasingly so) and cold, while still tall, namely germanics.
Moe abundance adaptation means bigger bodies capable of exploitig more resources. See giant insects in the carboniferous.
Blacks are also increasingly adapted to scarcity.
And scarcity adaptation means muscle absorbs less glucose which means less muscle and slower metabolism, higher insulin resistance and increasingly skinnyfat bodies.
Indians are scarcity adapted as result of high population subjected to famine and they are remarkedly unathletic.
