Word: oxygenation
(lookup in dictionary)
(lookup stats)
Dates: during 1980-1989
Sort By: most recent first
(reverse)
Anyone Have Oxygen?: The CCSU game was the fifth game in eight days for Harvard. When asked why the team stopped pressing in the second half, Co-Captain Scott Gilly said, "I think we started to get a little tired. To be honest, with this stretch of games, it was just a matter of us running...
...Nancy Cruzan's car swerved on an icy and deserted Missouri country road. The car flipped and crashed. The 25-year-old woman tumbled out and landed facedown in a ditch. Medical help arrived promptly enough to save her life but not fast enough to save her oxygen-deprived brain...
According to the Gaia hypothesis, earth's atmosphere would be unstable for life if it were not regulated by the biosphere, the envelope of life surrounding earth. Oxygen levels have remained at roughly 21% of the atmosphere for 200 million years, Lovelock asserts, whereas they should have fluctuated wildly, according to some geochemical models of the atmosphere. Were oxygen levels to rise above 25%, spontaneous fires would break out; if they dropped below 15%, many higher life-forms would suffocate. Climatologist Tyler Volk of New York University argues that life controls earth's temperature as well. In a study recently...
Gaia's critics have by no means been silenced. Some dispute the degree to which life-forms stabilize the atmosphere and temper the climate. Others contend that the emergence of oxygen in earth's atmosphere contradicts Gaia because it made the air poisonous for anaerobic creatures of primordial times. Evolutionary scholar Richard Dawkins argues that earth cannot be considered an organism because it does not reproduce. Gaian proponents respond that the increase of oxygen in the atmosphere was slow enough to allow the mix of life- forms to adjust, and physician-author Lewis Thomas answers Dawkins by coyly suggesting that...
...been poisoned before, 3 billion years ago, when the blue-green algae began manufacturing oxygen. That was the first ecological crisis. Life survived then. Life will not vanish now, but this may be the last chance for humans to go along gracefully...