system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why didn't humans get sunburns constantly before the invention of sunscreen?
gpt
They wore more clothing and sun umbrellas, avoided mid day sun, and had melanin levels suitable to their environment  (skin pigment).

They also tanned because they spent more time outdoors period. Which darkens the skin and protects it.

All this but they still got sunburns. But it's like bee stings. Unless it killed someone horribly or important not much chance of records.