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Look for sunglasses with an eye-sun protection factor (E-SPF) between 25 and 50, he said.
WSJ: The Crucial Years for Protecting Your Eye Health
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They weren't cancerous, but she began using a sun-protection factor of 45 as part of her daily routine.
WSJ: The Myths of Daily Sunscreen
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There are so far about 1, 000 candidate galaxies, some of which can out-shine our Sun by a factor of 100 trillion.
BBC: Supermassive black holes and hot galaxies in giant haul
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The rapidly-dropping cost of producing electricity from the sun is an important factor driving the solar surge.
FORBES: Solar Power: Ready, Set, Grow
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But two muffed fly balls by Wilson in center field--this was long before night World Series games, meaning that late-afternoon sun could be a big factor--contributed to a furious A's rally that didn't let up until 10 runs had crossed the plate.
FORBES: Magazine Article
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And if the medieval warmth were due to some external factor, such as a slightly brighter sun, that would suggest that the climate was indeed quite sensitive.
ECONOMIST: The science of climate change
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The result is a material that is not only waterproof but is able to block out UV radiation from the sun to such an extent that it would rate a Ultraviolet Protection Factor (UPF) of 101.15 if the chart went that high.
FORBES: Chinese Researchers Develop Waterproof Cotton
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Even as the sun came out Friday afternoon, the wind continued and was especially a factor on the 18th, playing dead into the breeze.
WSJ: 2012 Masters: Freddie Needs a Couple More Days