Nitrox in Nature
Sometime in the geologic past the Earth's atmosphere contained much more than 20% oxygen: e.g. up to 35% in the Upper Carboniferous. This let animals absorb oxygen more easily and influenced evolution.
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Famous quotes containing the word nature:
“There is more of good nature than of good sense at the bottom of most marriages.”
—Henry David Thoreau (1817–1862)
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