4 ms·

> something that has likely already introduced extraterrestrial Earth microbes to the moon and Mars So, life is possibly already multiplanetary?

zdragnar 2y ago
Atmospheric pressure of Mount Everest is about 1/3 of that of average at sea level on earth. The Martian average is 2% of Earth's atmospheric density, or about 0.6% pressure- very nearly hard vacuum, especially considering how little oxygen is present. Any earth life left behind is almost certainly dead or in hibernation type stasis. There's not much noteworthy about it unless Mars somehow develops a thicker atmosphere, better radiation shielding and warms up a fair bit... And if that miracle occurs, it's probably because far future humans have terraformed Mars to be habitable by humans, and we'll have already brought a whole bunch of algae and fungus and plants with us.
- gambiting 2y ago
  While yes, conditions are incredibly harsh, we've found life in such a variety of places on Earth I can't imagine there's absolutely nothing here that couldn't survive there - it's just it probably didn't hitch the ride to Mars. We've found bacteria(alive!) deep in polar ice, miles under the ground, on radioactive waste and in geothermal vents with no oxygen and in hundreds degrees celcius.
- 2Gkashmiri 2y ago
  Dont you need a 3T type MRI machine strength magnetic generator in.the right place to give Mars its shield. Thats what I remember
  - zdragnar 2y ago
    Only 1 or 2 Tesla field from a station at an L1 stationary orbit point, according to https://phys.org/news/2017-03-nasa-magnetic-shield-mars-atmosphere.html https://phys.org/news/2017-03-nasa-magnetic-shield-mars-atmo... Of course, actually getting that much material there, powering it, maintaining it, keeping it at the L1 point, whether it ends up being effective are all open questions.

4 ms·

> something that has likely already introduced extraterrestrial Earth microbes to the moon and Mars So, life is possibly already multiplanetary?

by incognito124 2y ago

zdragnar 2y ago
Atmospheric pressure of Mount Everest is about 1/3 of that of average at sea level on earth. The Martian average is 2% of Earth's atmospheric density, or about 0.6% pressure- very nearly hard vacuum, especially considering how little oxygen is present. Any earth life left behind is almost certainly dead or in hibernation type stasis. There's not much noteworthy about it unless Mars somehow develops a thicker atmosphere, better radiation shielding and warms up a fair bit... And if that miracle occurs, it's probably because far future humans have terraformed Mars to be habitable by humans, and we'll have already brought a whole bunch of algae and fungus and plants with us.
- gambiting 2y ago
  While yes, conditions are incredibly harsh, we've found life in such a variety of places on Earth I can't imagine there's absolutely nothing here that couldn't survive there - it's just it probably didn't hitch the ride to Mars. We've found bacteria(alive!) deep in polar ice, miles under the ground, on radioactive waste and in geothermal vents with no oxygen and in hundreds degrees celcius.
- 2Gkashmiri 2y ago
  Dont you need a 3T type MRI machine strength magnetic generator in.the right place to give Mars its shield. Thats what I remember
  - zdragnar 2y ago
    Only 1 or 2 Tesla field from a station at an L1 stationary orbit point, according to https://phys.org/news/2017-03-nasa-magnetic-shield-mars-atmosphere.html https://phys.org/news/2017-03-nasa-magnetic-shield-mars-atmo... Of course, actually getting that much material there, powering it, maintaining it, keeping it at the L1 point, whether it ends up being effective are all open questions.