For that matter, this would be a very different discussion if Everest were higher - it's geologically possible for a mountain to be significantly higher(1) than

For that matter, this would be a very different discussion if Everest were higher - it's geologically possible for a mountain to be significantly higher(1) than Everest, high enough that to get to the top you'd need something akin to a spacesuit. Equally, no human free diver is ever going to reach the bottom of the marina trench... 1) https://www.reddit.com/r/askscience/comments/174cxr/how_high_was_the_highest_mountain_ever_on_earth/c8243c5 https://www.reddit.com/r/askscience/comments/174cxr/how_high...