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6 votes

Could a civilization have existed on earth when our planet was much smaller, and as earth gained more size could it have grew around and above them?

If the setting is even remotely hard science, the planet will not grow significantly without adding mass. And adding mass means asteroid impacts which wreck the ecosphere. So the answer is no. ...
o.m.'s user avatar
  • 117k
7 votes

Could a civilization have existed on earth when our planet was much smaller, and as earth gained more size could it have grew around and above them?

Yes! As we all know, planets such as our Earth expand in size as they age and develop. Thought to be caused by thermal expansion in the deep chthonic zones of the planet, it was reasoned that this ...
elemtilas's user avatar
  • 40.7k
2 votes

Cool tropics, colder poles

Dumb luck or divine agency brought your world significant volcanic CO2 outgassing just in time to avert Snowball Earth. Now the glaciers are retreating and the deserts bloom with life watered by ...
g s's user avatar
  • 7,499
1 vote

Cool tropics, colder poles

There are too many variables at play, especially without a very detailed map of your world (including ocean circulation patterns etc...), to give you a really solid answer. You, knowing more of those ...
Ash's user avatar
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