The National Geographic Magazine, Volume 193, Issue 3National Geographic Society., 1998 - Geography |
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Page 72
... oxygen and sunlight , and , at the bottom , bacteria that thrive only in the absence of oxygen and sunlight . Sediments trapped in the mat bind with calcium car- bonate from the water , con- stantly building up the solid rock base . To ...
... oxygen and sunlight , and , at the bottom , bacteria that thrive only in the absence of oxygen and sunlight . Sediments trapped in the mat bind with calcium car- bonate from the water , con- stantly building up the solid rock base . To ...
Page 73
Where light is plentiful , oxygen - producing pho- tosynthetic cyanobacte- ria coexist with oxygen- dependent microbes . Stromatolite layers A menagerie of species makes up a stromatolite . One square foot may contain half a billion ...
Where light is plentiful , oxygen - producing pho- tosynthetic cyanobacte- ria coexist with oxygen- dependent microbes . Stromatolite layers A menagerie of species makes up a stromatolite . One square foot may contain half a billion ...
Page 75
... oxygen , an extremely toxic gas to other bacteria and archaea . At first those life- forms didn't have to deal with this poison because the atmosphere and ocean held almost no free oxygen . Then cyanobacteria evolved and started waging ...
... oxygen , an extremely toxic gas to other bacteria and archaea . At first those life- forms didn't have to deal with this poison because the atmosphere and ocean held almost no free oxygen . Then cyanobacteria evolved and started waging ...
Contents
Naples Unabashed A city schooled in passion chaos and | 32 |
The Rise of Life on Earth Microscopic lifeforms | 54 |
Flashback | |
Copyright | |
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animals asked bacteria Bank beetles began begins believe billion body build California called cells chum CLARITIN close coast coral covered daily dose early Earth eggs evolved eyes feet fish Florida forest forms four ground growing hands head herders hold human hundred inside Islands It's Italy keep light live look loratadine manager MARCH marine miles move named Naples NATIONAL GEOGRAPHIC natural Neapolitans Nenets ocean once organisms original oxygen passed patients photographs plant produce protect reef reindeer remain road rock sanctuary says scientists seemed Serotetta species stand streets studies thing Today tree tundra turned University walking watching West whales young