By tracking the blinking light of distant stars, NASA's Kepler space telescope has identified the first Earth-sized exoplanets, and another which orbits its star in the "Goldilocks zone," where liquid water--and possibly life--could exist. Principal investigator William Borucki talks about the newly discovered worlds.
The 112th Audubon Christmas Bird Count is underway. Citizen scientists armed with binoculars are recording data vital to monitoring bird health and conservation. But before you can count a Snowy Owl or a Rufous Hummingbird, you need to identify it. Birder Richard Crossley has some tips.
Forty years ago, President Nixon signed the National Cancer Act, beginning the War on Cancer. Harold Varmus, director of the National Cancer Institute, discusses four decades of scientific progress in preventing, detecting and treating cancer--and the mysteries that still remain.
Discarded plastic shampoo and juice bottles are finding new life in unlikely places--as bridges, railroad ties and pilings. Jim Kerstein, CTO and founder of Axion International, talks about how his company transforms plastic waste into structures strong enough to support trucks, trains and tanks.