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Silurian hypothesis
04-24-2019, 11:30 AM (This post was last modified: 04-24-2019 11:32 AM by Maximilian Hohmann.)
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RE: Silurian hypothesis

(04-23-2019 10:27 PM)Leviset Wrote:  What I’ve NEVER seen discussed is why do we only look for intelligent(?) life like our own that breathes oxygen? Could there not be lifeforms that evolved that could survive on planets that needed obnoxious elements (cf to us) like Sulphur, CO2, N etc.

If you take a close look at the literature about astrobiology and SETI as far as intelligent life is concerned you will find that no researcher excludes anything. There are plenty of (micro)organisms on our planet who do not need oxygen or carbon but sulphur instead as you write. See for example this Wikipedia article here:
Future space probes to the large moons of Jupiter and Saturn will explicitely search for lifeforms which may have evolved in their oxygen-less environments.

(04-23-2019 10:27 PM)Leviset Wrote:  Lifeforms that could exist under atmospheric pressures that would crush us.

We don't get crushed by atmosperic (or hydrostatic) pressure either. Only gas-filled cavities inside the body with no connection to the outside will. A healthy human should not have any of these, otherwise deep-sea diving (divers who service oil platforms dive beyond 300m of depth which amounts to 30x our atmospheric pressure!) and similar activities would not be possible.

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Messages In This Thread
Silurian hypothesis - Leviset - 04-23-2019, 10:27 PM
RE: Silurian hypothesis - Maximilian Hohmann - 04-24-2019 11:30 AM
RE: Silurian hypothesis - Leviset - 04-24-2019, 03:14 PM
RE: Silurian hypothesis - Thomas Okken - 04-24-2019, 03:59 PM
RE: Silurian hypothesis - KeithB - 04-25-2019, 05:55 PM
RE: Silurian hypothesis - pier4r - 04-25-2019, 09:39 PM
RE: Silurian hypothesis - Massimo Gnerucci - 04-26-2019, 10:22 AM
RE: Silurian hypothesis - rprosperi - 04-26-2019, 01:08 PM
RE: Silurian hypothesis - pier4r - 04-26-2019, 07:29 PM
RE: Silurian hypothesis - Valentin Albillo - 04-26-2019, 09:27 PM
RE: Silurian hypothesis - Didier Lachieze - 04-26-2019, 12:59 PM
RE: Silurian hypothesis - Massimo Gnerucci - 04-26-2019, 01:23 PM

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