What is the origin of the Black-skinned human, and did his skin become black due to the heat of the sun, or is there divine wisdom and power in that?

It has been established in the hadith that the variation in the skin colors of Adam's descendants is due to the different colors of the soil from which Adam was created. The statement that skin darkening is caused by the sun's heat is incorrect, both Islamically and factually, because climate does not alter genetic makeup, and everything in the universe is by Allah's power and wisdom.