Different physiology adapted for their environment. Bones (or lack off), respiratory systems etcIf the pressure is really high deep in the ocean and can easily crush a human, how come certain animals survive there?
Meant to?i think its important to study that stuff because that is really where the answers of our origins lie, but maybe we aren't meant to understand it.
But we are stuck with fantasy shyt like colonizing mars and stuff, instead of the more practical thing to do which is healing the planet we already live on. It just speaks to how we don't give a fukk and will give into our pleasures, live in la la land until something awful happens