| Link | Quote | Stars | Tags | Author |
| 435d7f5 | Oxygen flooded into the atmosphere as a pollutant, even a poison, until natural selection shaped living things to thrive on the stuff and, indeed, suffocate without it. | life natural-selection oxygen | Richard Dawkins | |
| ea9fd36 | Ed felt faint. Milk shake, as it turned out, was much less handy in your veins then, say, oxygen. | milkshakes oxygen veins | Francine Pascal |