Discussion: Language, without barometer

Suppose that in ten million years, humanity has been long wiped off the face of the planet. Some life still remains, but it has regressed to a more primitive state, due to some cataclysmic event, caused by our own iniquity, or some element of chance.
No animal that could understand the basics of calculus has existed on the rock called Earth for a very long time.

When one day, entirely by chance, our no longer blue planet is discovered, by some nomadic civilisation …