Word: ultraviolet
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...scientists speculate that among the large life forms that could have evolved on Mars are ";petrophages" (rock eaters), which get their water and minerals from rocks; "crystophages" (ice eaters), which tap the permafrost beneath the surface; and creatures with shell-like shields for protection against the strong ultraviolet solar radiation that reaches the Martian surface...
...base here, has potential," he says, walking around the granite pier that supports the Refractor. Brilliant murals signed "Sergei Gaposhkin, 1957" line the walls. Wolbach frowns at them. "A Russian individual by the name of Sergei Gaposhkin--Dr. Gaposhkin--was given liberties, here. He, ahem, found the ultraviolet paint, as you see, and then he--painted." Wolbach comes down with emphasis on the last word, and stops in front of a vivid pink, flaming...
...large part of the controversy over the British-French Concorde arises from concern about the big jets' effect on the ozone layer, which protects life on earth from lethal doses of ultraviolet light. Laboratory tests and chemical theory have shown that the nitrogen oxides given off by jet engines destroy ozone. Do nitrogen oxides have the same effect in the stratosphere? A Dutch meteorologist working at Boulder, Colo., reports there is now evidence that the answer...
...stratosphere at an altitude of about 25 miles over the polar regions, and thus depleted the ozone over these areas by an amount he calculated at 20%. There was a way of checking his theory. A Nimbus satellite, in orbit at the time, had been measuring the amount of ultraviolet light reflected from the earth's atmosphere. Because ozone absorbs ultraviolet, any decrease in ozone would result in an increase in the ultraviolet "seen" by the satellite. Sure enough, after months of analyzing data from the Nimbus, two NASA scientists, Donald Heath and Arlin Krueger, determined that the solar...
...NOAA, T.E. Holzer of NCAR and Crutzen suggest that the solar particles may not directly wreak their havoc on life during magnetic field reversals. Instead, unobstructed by the field, they may deplete the ozone layer by as much as 50% by creating nitrogen oxides, letting in lethal doses of ultraviolet light...