Quote:
Originally Posted by xelasnave
Did you notice there is a critter that can survive at the temp of liquid nitrogen? sorry I cant provide a link
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Hmm .. from Wiki, a nematode called
Haemonchus contortus can survive at liquid nitrogen temperatures for 44 weeks.
However looking further, it seems there's another beastie called a
"Water Bear" (Tardigrade) which can survive:
1) being heated for a few minutes to 151 °C (424 K) or being chilled for days at -200 °C (73 K), or for a few minutes at
-272 °C (~1 degree above absolute zero !!!);
2) can withstand vacuums and pressure 1200 times atmospheric pressures, and have been tested in space for at least 10 days.
Some can withstand 6000 atmospheres !!
3) 10 years without water;
4) can withstand median lethal doses of 5,000 Gy (of gamma-rays) and 6,200 Gy (of heavy ions) in hydrated animals (5 to 10 Gy could be fatal to a human).
Amazing stuff .. looks like they sent a few of these up to the space station on the final flight of the Endeavour.
The more one looks into this, the more it becomes clear that the most important question is about abiogenesis .. ie: the origin of life. Clearly, once life gets started, we know it can survive unbelievable changes in environment, and is incredibly hardy and adaptable.
The real issue is one we may never work out the answer to .. how it all got started. Perhaps the best solution to answering the riddle, is still exploration by humans, (first choice), followed by robotic analysis with Earth return samples preferred, then followed by remote robotic analysis. Remote sensing is definitely very 'hit and miss', but by far the least accurate would have to be inference based on Habitability Zone (??)
What do you/others think ?
Cheers