Mt Everest is just under 5.5miles high. Olympus Mons on Mars is 16 miles high. Why aren’t there much larger mountains on Earth? What’s the highest a mountain can go on Earth?
If you took all the water away it would make a significant difference. There isn’t any surface water on mars. The Pacific is 6.7 miles plus deep so add that to Everest it’s pretty high.
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