Answer:
maybe there was a human that wasn't a mammal.
Explanation:
they could of
The answer is A infectious disease
Religious, faith, race, age, etc.
Eternal Existence
Deity - a god or goddess (in a polytheistic religion).
I would say that the temperate zones though they do have areas such as the Pacific NW that have significant rainfall, but relative to the tropics are apparently relatively dry since they contain most of the world's deserts like the Sahara, the Sonora and the Gobi and the Atacama for example.