Dec 02 Watch Virtual Colonoscopy A procedure that lets doctors find abnormal growths in the colon through 3-D computer-generated images is at least as accurate as a more invasive conventional colonoscopy, suggests research that was presented Monday. Margaret Warner speaks with the study's lead author,… Continue watching
Dec 01 Watch Computer Worms and Viruses Computer security technologists are racing to find ways to block ever-more complex computer worms and viruses that burrow into computers -- usually via e-mail -- and wreak havoc on network systems. Continue watching
Nov 18 Watch Amputees Reconnecting Scientists are discovering new ways to help amputees reconnect with the functionality of their missing limbs. Tom Bearden reports on this cutting-edge technology. Continue watching
Nov 07 Watch Reservations: Burned Out Some Native Americans who live on the dozen Indian reservations in eastern San Diego County have not received the same attention as other Californians for their suffering. Jeffrey Kaye of KCET-Los Angeles visited the devastated San Pasqual Reservation, where one… Continue watching
Nov 04 Watch Elegant Universe: String Theory The final installment of a three-part NOVA series about "String Theory," a new branch of science that seeks to explain nothing less than how the universe works, airs on PBS. Ray Suarez speaks with series host Brian Greene. Continue watching
Oct 31 Watch California Firestorms Cooler temperatures and dense fog brought encouragement to Californians after a week of wildfires that have killed 20 people, destroyed more than 2,800 homes and burned nearly 750,000 acres. Jeffrey Kaye reports from the Cedar Fire outside San Diego, which… Continue watching
Oct 30 Watch California Firestorms More temperate temperatures and some light rain moved into the San Bernadino Mountains and eastern San Diego County, but firefighters face flames fanned by winds that are still gusting to 40 miles per hour. Spencer Michels reports from California, and… Continue watching
Oct 29 Watch Solar Storm A giant geometric flare unleashed by the sun threatened to disrupt airline and satellite communications and trigger shutdowns on electrical power grids Wednesday. Margaret Warner talks to an expert about what causes solar flares and how they affect Earth. Continue watching
Oct 28 Watch California Wildfires Wind-swept wildfires have consumed 522,000 acres of Southern California, destroyed 1,552 homes and claimed 17 lives. Jeffrey Kaye of KCET-Los Angeles provides a firsthand view of the devastation from the fireline in San Bernadino. Continue watching
Oct 23 Senate Unanimously Approves Anti-Spam Bill, but Hurdles Remain The U.S. Senate Wednesday night passed an anti-spam bill by a 97-0 vote, though industry experts offer a more cautious assessment of the measure. Continue reading