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

Because being black and lactose intolerant isn’t really helpful in a region with little sunlight and where milk is 50% of the diet, so evolution selected for straits for those regions.