• February 9, 2011   BY Lauren Knapp  

    Starting Monday, “Jeopardy!” viewers will witness a classic three-day man vs. machine match. In a John Henry, or better yet, Deep Blue vs. Garry Kasparov-style competition, the quiz show’s two most successful players, Ken Jennings and Brad Rutter, will compete … Continue reading

  • February 8, 2011   BY Miles O'Brien  

    Back in the days when we thought a “dirty bomb” might be a raunchy joke gone awry, young David Hahn was gathering all the radioactive material he could get his hands on. But he came in peace. Hahn is the … Continue reading

  • February 8, 2011  

    Science correspondent Miles O’Brien examines the threat that radioactive “dirty bombs”could pose to cities in the U.S., and what’s being done to prevent a radiological attack from happening. Continue reading

  • February 7, 2011   BY Jenny Marder  

    Maps, Activism and Technology: Check-Ins with a Purpose Introducing Sukey, the “maptivism” app. Detailed in this column is a sort of Four Square for nonviolent organizing: location-based mobile social networking that allows people to check in during demonstrations, track crowds … Continue reading

  • February 7, 2011   BY Jenny Marder  

    Bed bugs are survivors. They grow as large as ladybugs and can live a year without eating. They move from room to room and leave itchy, bloody welts on skin when they bite. And they wreak havoc on the minds, … Continue reading

  • February 6, 2011   BY Jenny Marder  

    Two solar probes have beamed back the first full images of the sun. The identical twin STEREO spacecraft were launched in 2006, and moved into orbiting positions at opposite sides of the sun on Sunday. NASA has combined images from … Continue reading

  • February 4, 2011  

    In other news Friday, winter weather continued its assault around the U.S. as bitter cold gripped New Mexico for a fourth straight day. In Dallas, five inches of snow canceled flights ahead of Super Bowl weekend. At Cowboys Stadium, the site of Sunday’s game, six people were hurt by ice falling from the roof. Continue reading

  • February 3, 2011  

    Perhaps you learned a mnemonic device such as the one above to help remember the planets — Mercury, Venus, Earth, etc. — and their order away from the sun. Turns out, we’re going to need a longer mnemonic after the discovery of some 1,200 planets outside our solar system. Miles O’Brien discusses the findings with Jim Lehrer. Continue reading

  • February 3, 2011   BY Lea Winerman  

    A sand dune on Mars changes over the course of two seasons. (Image courtesy Science/AAAS). A Texas-sized field of sand dunes around Mars’s north pole — long thought to be a static, unchanging remnant of the planet’s more active geological … Continue reading

  • February 3, 2011   BY Jenny Marder  

    A Georgetown neuroscientist’s theory on the origins of tinnitus, the phantom ringing that plagues millions of Americans and countless military veterans. Continue reading