Hominid ancestors likely controlled their microclimate with fire to survive colder climates before clothing.

“they're moving north out of africa at around two million years ago what's fascinating is that's the beginning of the last ice age so we have our ancestors moving north out of africa you know going into northern latitudes at the beginning of the last ice age the only way that that is possible is if you're um not only using fire to help um uh prepare raw materials from different environments and for food and diet but also you're controlling your microclimate and you're keeping yourself warm enough that you're not going to die”