The Night Sky

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Microorganisms that not only survive in areas of
high temperature, but that thrive
there! Temperature Range 42oC to 113oC (well
over the boiling point of water!!!!)
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Microbes that prefer to live in cold
temperatures that linger around the freezing
point of water and sometimes lower! Temperature
Range -3oC to 20oC
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Microorganisms that thrive in extremely acidic
conditions. These microbes actually prefer
living in liquids like boiling sulfuric acid. pH
Range less than pH 5 for optimum growth
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Acidophiles
This is a picture of Cyanidium caldariam, an
organism that can live in a pH as low as ZERO!!!
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Acidophiles
This warm, acid spring is a common habitat for
acidophiles.
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These microorganisms like to live in areas of
high alkalinity. pH Range greater than pH 9
for optimum growth
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Microbes that prefer to live in environments of
extreme pressures such as miles under the
ocean. Pressure Range gt 400 atm for optimum
growth
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Barophiles
This barophile was found in sediment deep on the
ocean floor.
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Microorganisms that grow in extremely dry
environments with only intermittent moisture.
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Desert Varnish
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Microorganisms that like to live in salty
environments. Think about the rules governing
osmosis and you will see why this could be a
problem!! Salt Concentration gt5 for optimum
growth (sea water is about 3)
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These are microbes that dont like to function
with oxygen in the environment. May use gases
other than oxygen in order respire
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Methane ice (crystallized structures of methane
water) that can form under conditions of low
temperature and high pressure.  This methane
hydrate mound (right side of photo), in the Gulf
of Mexico has thousands of polychaete worms
living on its exposed surface. 
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Is this evidence of life?
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