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:
“Progress celebrates Pyrrhic victories over nature. Progress makes purses out of human skin. When people were traveling in mail coaches, the world got ahead better than it does now that salesmen fly through the air. What good is speed if the brain has oozed out on the way? How will the heirs of this age be taught the most basic motions that are necessary to activate the most complicated machines? Nature can rely on progress; it will avenge it for the outrage it has perpetrated on it.”
—Karl Kraus (1874–1936)