About how thick is the biosphere ?

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asked May 21, 2016 95.8k views

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Friartuck · Answer 1 · 2016-05-22T13:51:08+0000

Microscopic organisms live at such extremes that, taking them into consideration, the thickness of the biosphere is much greater. Culturable microbes have been found in the Earth's upper atmosphere as high as 41 km (25 mi).

About how thick is the biosphere ?

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