/sci/ - Science & Math

The planet started to cool significantly about 1600 years ago, but nobody knows what causes ice ages so its hard to tell when the next one will kick in.

If global warming is going to kill everything then how did humanity manage to survive in ancient Rome when temperatures were 3ºC higher than they are now and there was no air conditioning or refrigeration? What about ancient Egypt when it was 4ºC warmer? Egypt is already plenty hot in the present, can you imagine it 4ºC hotter and without air conditioning and refrigeration? Did everyone die? Did civilization collapse?