If modern humans came out of Africa 300,000 years ago, how did everyone who isn’t black get their skin colours?

Question

If modern humans came out of Africa 300,000 years ago, how did everyone who isn’t black get their skin colours?

In: 4

Answer 1

You just described evolution. All lifeforms change to adapt to their environments. Darker skin is better for exposure to sunlight. Lighter skin is better to generate vitamin D from sunlight. There is less sunlight in the northern hemisphere due to where the land masses are.