I have now seen a small handful of programs that deal with creatures living where we thought was uninhabitable - i'm talking mostly about the very darkest of the bottom of the oceans but also caves in complete darkness.

So taking a closer look at the bottom of the oceans. Has anyone any knowledge about which creatures here on the Earth live in the most hostile parts of Earth? Maybe you have a link to a page where it is stated how great a pressure those creatures live at and how bright it is down there (for caves the brightness must be exactly 0 something, so probably we can have creatures on total darkness on the bottom of the oceans aswell. Temperature must be interesting to look at too. And maybe some other interesting things that show how hard living these creatures are.

I was then aiming at finding simular data for Venus as i know the pressure and the temperature is extremely high on Venus - just to see how far we are from finding creatures that would actually be able to survive on Venus.

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As far as I know, living extremophiles on Earth only survive at temperatures below 100 C.

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Hyperthermophilic bacteria growing near hydrothermal vents live at 115 C.

Grant Hutchison

Yeah, but it's a dry heat... oh wait...

Still, on the surface of Venus, it's hot enough to melt lead.

Indeed. It's certainly difficult to imagine biological molecules surviving at those temperatures, and in the absence of liquid water.

Grant Hutchison

Some interesting speculations about life in Venus's clouds here (and about life elsewhere in the Solar System)
http://www.liebertonline.com/doi/pdf...ast.2005.5.778
Schulze-Makuch seems to think that the chemicals in the clouds at 40 km could support life; a kind of photosynthesis could manufacture water from H₂S and CO₂.

Of course because it might be possible doesn't mean it is true.

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I have heard about that too from a danish scientist. It could really be an interesting thing to find a sort of life in the clouds. And who can say clouds limit the evolution of life. If there was high-intelligens creatures up there we probably would have noticed, but who can say we won't find something a bit simular to birds? OK, i know that is optimistic, but on the other hand we can't say it isn't so. We might find life on other areas than we'd expected. But finding evidence of microbes in the clouds would be a very great thing too

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I think on NASA's website, there was an article that described various extreme lifeforms.

Some can live in sulfaric acid.
Some can withstand high does of radiation.
Some thrive in boiling water.
And some can survive high salinity.

Bacteria have been found deep beneath the Earth as well (not just the topsoil, mind you. Deep in hot rocks).

Personaly, I'd look under Europa's ice rather than the Venusian surface for life.

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Wasn't trying to say Venus is the planet/moon with the biggest chance of finding life, just thinking about if we could find bacterias here on Earth that could live on Venus. But yes, Europe (and some other objects in the solar system) surely has a bigger chance of harbouring life

But yes, now that you mentioned those lifeforms i have to say - those bacterias are we say that there could be a possibility of life on Venus.

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*gets a mental image of the Avians in the Rama series*

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Never heard of that one though.

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It is worth remembering that scientists can speculate about where or where there isn't life. Until they've actually made a detailed study and have first hand evidence directly from a location, it impossible to tell. Whilst the conditions on Venus certainly put life presence in doubt, we can't rule it out. In fact the further the boundaries are pushed, life seems to find new ways of surprising us.

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Yes, i find that life is surpricing up very often, the reason i started this thread. Life here on Earth is much stranger than first thought. Life seems to be everywhere more or less.

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I met him last year, and he talked about that but he didn't sound completely convinced himself. And actually, I think he said it was David Grinspoon's idea.

As far as hyperthermophiles, there is one known as Strain 121 that grows optimally at 121C and can survive up to around 128C or 129C. But don't count on it being the record-holder for too long. New bugs are being discovered pretty frequently these days.

However, hoping to find anything even remotely capable of coping with Venusian surface temperatures, not a chance. The pressure is not a huge issue, but what are your cells going to be made out of at that temperature?

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Yeah, probably won't take many years before we encounter microbes or semi-animal creatures that could thrieve on other planets or moons in our solar system. I know that extremophiles known today should be able to survive the trip to Mars and live on Mars wherefrom they could prosper. I presume they aren't much more than bacterias.

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Thx for the link.

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