Questions tagged [extreme-terrain]

For questions regarding extraordinary geographical features.

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21
votes
7answers
4k views

Hollow planet with another planet inside it

I was wondering what would happen if there was a planet with a "shell" of stone entirely surrounding it (not connected, just held in place by gravity), with a few holes all the way through the outer ...
30
votes
7answers
1k views

How can the terrain of a large area change abruptly in a short period of time?

By "short period of time", I'm referring to the timeframe of weeks to months (not days or hours). For example: at the start of one day the land is flat, but after a few weeks or months there is a ...
8
votes
3answers
789 views

Giant rock spikes sticking out of the ground

Would it be possible for huge, hundreds-of-metres-long spikes of rock, ideally slanting at an angle, to arise under natural processes? For clarity, I mean like this: Copyright Joe Jesus There are ...
11
votes
5answers
2k views

A water cycle in an underground setting

The ozone layer depleted beyond reasonable levels and life on the surface has become impossible and life migrated underground in giant caves connected together by tunnels. Some of those caves have ...
13
votes
3answers
555 views

Can life arise on a brown dwarf?

Brown dwarfs are celestial bodies in the gray area between planet and star. They're huge, gaseous, hot compared to planets, and come in all different kinds. (1) Is it possible for life to develop in ...