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| Evolution Deep Sea Vents and Life's Origins |
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http://www.myspace.com/acorvettes
Bacteria found deep in the ocean in the
volcanic regions of mid-ocean ridges suggest
a possible scenario for the beginning of life
on earth.
Ocean water seeps into cracks created by
sea-floor spreading at the mid-ocean ridges
and is heated by magma from inside the earth.
Water in these hydrothermal vents reaches
temperatures of 375 degrees C and higher and
is rich in dissolved minerals. The hot water
rises from the vents in geysers and meets
cold ocean water, causing minerals to
precipitate out of solution as the water
cools. In some places compounds of iron and
sulfides form "chimneys" on top of the vents.
Such an extreme environment seemed unlikely
to support life given the conditions of
temperature, pressure, and absence of light
for photosynthesis.
Tags : Evolution science biology creationism ID Transitional fossils ken hamm kent hovind |
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Affichage : 6385
Durée : 240 s |
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