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A Cut above: Ultrapowerful Laser Offers Greater Precision Sans Heat Damage [Slideshow]November 20, 2008, 5:15 am by Scientific American: HealthMost lasers rely on continuous waves of energy to generate heat that allows doctors to make cuts during surgery, computers to burn information onto CDs and DVDs, and scanners to read bar codes. But a newer type of laser promises to do all of these things more efficiently using quick, short blasts of energy. This pulsed-laser technology has been around since the 1980s but high cost has kept it from becoming widely used. Petaluma, Calif.–based Raydiance, Inc., however, hopes to overcome that obstacle with the latest version of its ultrashort pulse (USP) laser system unveiled Wednesday. [More]
More from Scientific American: Health A Blind Man Sees Scientific American: Health: January 5, 2009, 4:00 am [Below is the original script. But a few changes may have been made during the recording of this audio podcast.]Given that we just said goodbye to another year, we are all pretty Infecting Mosquitoes Before They Infect Us Scientific American: Health: January 2, 2009, 12:05 pm [The following is an exact transcript of this podcast.]Mosquitoes carry nasty diseases--dengue fever, west nile, malaria. But the microbes that cause those diseases don’t attach themselves to the mosquitoes and then immediately Does Exercise Really Make You Healthier? Scientific American: Health: January 2, 2009, 11:20 am The Department of Health and Human Services (HHS) late this year released its new Physical Activity Guidelines for Americans, calling for adults between the ages of 18 and 64 to exercise moderately Looking for Sleep in All the Wrong Places Scientific American: Health: January 1, 2009, 1:00 am Desperately seeking a good night's sleep, insomniacs spend more money on alcohol than medical help and sleep aids combined, according to a study published today in the journal Sleep. But experts say Science's 2008 Achievement List Scientific American: Health: December 31, 2008, 12:05 pm [The following is an exact transcript of this podcast.]It’s the time of year to take a look back--and that’s just what the journal Science did as they listed their most important breakthroughs
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