Timeline for How can I have a habitable world on which life can not develop?
Current License: CC BY-SA 3.0
6 events
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| Mar 9, 2017 at 16:07 | history | edited | Mike Vonn | CC BY-SA 3.0 |
Added extra clarificaton.
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| Mar 9, 2017 at 11:57 | comment | added | JollyJoker | Without the en.wikipedia.org/wiki/Ozone_layer the Earth would fit this scenario. Perhaps the colonists could keep it habitable by creating ozone or preventing it from being depleted? | |
| Mar 8, 2017 at 20:43 | history | edited | Mike Vonn | CC BY-SA 3.0 |
added extra explanations
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| Mar 8, 2017 at 20:35 | comment | added | Mike Vonn | Understood, it is just a matter of scale or dose. D. Radiodurans gets its resistance by keeping multiple copies of it's DNA and repairing the damaged DNA. You can still kill it with UV, It just takes a larger dose. ncbi.nlm.nih.gov/pmc/articles/PMC3685888 If one subscribes to the idea that life developed from single celled organisms that were either seeded or spontaneously developed, preventing simple single celled organisms from even developing, or killing them all off once they have developed, keeps the planet sterile but provides a habitable one to explorers. | |
| Mar 8, 2017 at 18:35 | comment | added | Sneftel | Keep in mind that Earth already has a good bit of UV hitting it, and yet is not devoid of life. Ratcheting up the intensity would kill a lot of current organisms, but it wouldn't definitionally prevent other, better-adapted organisms from thriving. Deinococcus radiodurans is an example of an extremely UV-tolerant organism. (It's the honey badger of radiation.) | |
| Mar 8, 2017 at 16:34 | history | answered | Mike Vonn | CC BY-SA 3.0 |