A discovery in an underwater cave in Mexico may indicates the earliest human settlers of the Americas.
I am always astounded that we humans have made it as far as we have. Being large, nearly-hairless apes, it’s amazing that our ancestors managed to survive as they migrated out of Africa and into Eurasia, facing much harsher and colder climates than they had been accustomed to. But I assume that human success hasContinue reading “Why does it hurt to breathe cold air? Who “nose”?”