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Contents
- Sweet Confusion: Does high fructose corn syrup deserve such a bad rap?
- Closed Thinking: Without scientific competition and open debate, much psychology research goes nowhere
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- Major twister hits Oklahoma: Its speed, which largely determines the damage it causes, is still unknown
- Why a tornado forms: Tornadoes start with a thunderstorm. But they also require other ingredients, such as instability.
- A mind for math: A part of the brain associated with making memories may also predict success in learning math
Web edition: September 9, 2011
Print edition: September 24, 2011; Vol.180 #7 (p. 4)
ALGAE COULD PROVIDE OXYGEN FOR SPACEMAN — Minute plant life that form the common green scum found on the surface of stagnant ponds and in river beds, Chlorella algae, assisted by the sun, may provide the future man in space with the oxygen essential to maintain life. A new gas exchange device operating on the principle of photosynthesis was designed and demonstrated by Lt. Col. John B. Fulton of the U.S. Air Force Arctic Aeromedical Laboratory, Fairbanks, Alaska. The algae using the energy of the sun convert the carbon dioxide exhaled by the astronaut into oxygen which is breathed in and exhaled again as carbon dioxide, the process being repeated indefinitely.
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