Posts Tagged ‘ultraviolet’
How pale people evolved to be tan free
PENN STATE (US)—People who remain pale and never tan can blame their distant ancestors for choosing to live in the northern reaches of the globe. Likewise, those who easily achieve a deep, dark tan can thank their ancestors for living in the subtropical latitudes, according to Penn State anthropologists. Continue…
Thursday, June 24, 2010 14:45 - 0 Comments
Science & Technology - Jun 4, 2010 10:58 - 0 Comments
Early haze likely shaded Earth from UV
U. COLORADO (US)—A thick organic haze that enshrouded early Earth several billion years ago may have been similar to the haze now hovering above Saturn’s largest moon, Titan, and would have protected primordial life on the planet from the damaging effects of ultraviolet radiation. (more…)
Health & Medicine - Apr 29, 2010 22:16 - 0 Comments
Chromosome caps no match for UV
YALE (US)—The molecular caps at the ends of chromosomes that protect humans against cancer and premature cellular aging show a surprising inability to protect themselves against ultraviolet radiation, according to a new study. (more…)
Science & Technology - Mar 10, 2010 18:15 - 0 Comments
How retina’s hardware processes color
NYU (US)—Biologists have identified, in greater detail, how the retina’s cellular hardware is used in color preference. The work enhances our understanding of how eyes and the brain process color. (more…)
Science & Technology - Dec 15, 2009 12:24 - 0 Comments
Cooking up clear, UV-proof glasses
PENN STATE (US)—Adding cerium oxide to phosphate glass rather than the commonly used silicate glass may make eye glasses that remain colorless, block ultraviolet light, and have increased resistance to radiation damage. (more…)
Science & Technology - Oct 26, 2009 15:12 - 0 Comments
Radiation’s no match for bulletproof bacterium
CORNELL—Listed in the Guinness Book of World Records as “the world’s toughest bacterium,” Deinococcus radiodurans can withstand harsh conditions, lack of nutrients, and a thousand times more radiation than a human being. Now researchers think they’ve identified the ace up its sleeve. (more…)
Best of 2009 - Oct 22, 2009 14:09 - 12 Comments
BEST OF 2009: Fish switch it up to get the blues
EMORY (US)—Researchers have discovered the first example of an animal deleting a molecule to change its visual spectrum, linking evolution to functional changes and the possible environmental factors driving them. (more…)
