Word: oxygenate
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...life jacket, swung by rope to a spindly ladder, and climbed 150 feet to the rig's platform, where a helicopter was awaiting him. At an airbase on the mainland, they crammed Boggs into a flight suit, strapped him into a two-seat jet trainer, clapped an oxygen mask on his face, took away the sandwich he had been clutching, and rocketed him back to Washington...
...evolutionary stage, says Dr. Mayerson. It is found only in higher animals; the higher the animal, the more complex the system. The complexity is necessary, says Dr. Mayerson, because in the mammal, nature evolved a closed, high-pressure blood-circulating system with conduits of diminishing thickness carrying blood and oxygen to thin-walled capillaries. "But here, nature ran into a snag: the high pressure made the capillaries leaky." Even the large molecules of proteins slip through delicate capillaries. Nature had to invent a collection and drainage system so that whatever Leaked into the tissue spaces around the capillaries could...
Students of ancient life believe that billions of years ago the newly formed earth was covered by an atmosphere that had no free oxygen in it. Instead it had methane, ammonia, carbon dioxide and other gases that cannot be breathed by modern animals. Lightning flashes, so the theory goes, forced these gases to form complicated chemicals that dissolved in sea water. There the chemicals reacted with each other and the water, forming bigger and bigger molecules. After millions or billions of years of this process, a single molecule-perhaps a nucleic acid-was formed that had the ability to grow...
Drifting & Dreaming. The Sigma 7 was equipped for a few scientific experiments, including some star observations for Schirra to make. But the main purpose of the six-orbit flight was to check the performance of the capsule's oxygen, electrical-and attitude-control systems. Considered critical was the amount of fuel needed. Schirra proved, as the technicians had suspected, that both Glenn and Carpenter could have managed with much less fuel if they had done less aimless maneuvering...
...system the capsule can get along with less fuel on even longer orbits. A heavy periscope can also be dumped, because Schirra proved that tricks of maneuvering that make it unnecessary can be accomplished with very little fuel. These savings can be invested in other desirables, such as more oxygen for breathing and more water for cooling...