What would be the effect of slightly higher atmospheric pressures on human evolution?

Much like how certain cultures have adapted to live at extremely high altitudes, what would be the evolutionary effects if humans today were taken to a planet with atmospheric pressure not unlike an early Earth? Think something oxygen-rich, about 4 bars of atmospheric pressure. The catch is that gravity is only 80% of Earth's gravity (think Venus' gravity compared to Earth).

I understand that humans living in a lower-gravity, oxygen-rich world might adapt to become taller and more spindly on average compared to humans today, but I don't know what effects atmospheric pressure would have on that growth -- would they become taller but 'stronger' (i.e., denser bones) compared to people from Earth? I'm no scientist and so my attempts at researching this have confused me at best! Any ideas you could suggest would be very much appreciated.

is a duplicate

This question has been asked before and has already been answered. It should be marked as a duplicate.

Please enter the URL of the proposed duplicate in the details field below.

not constructive

This question cannot be answered in a way that is helpful to anyone. It's not possible to learn something from possible answers, except for the solution for the specific problem of the asker.

Communities

What would be the effect of slightly higher atmospheric pressures on human evolution?

0 comment threads

0 answers