The author first updated "Bathing in the Light"
"Is it hot at your house today?"
"Is it cold at your house today?"
"Are you full today?"
It mainly describes that after experiencing extreme weather, just like Homo erectus and Homo sapiens, people re-adapted to the environment and re-explored the world. The difference is that they do not need to start with the discovery of fire, but they need to re-understand agriculture and resources...
Mission: Survival of the fittest