Jan 05 Mars Rover Sends First Images to Earth The robotic explorer Spirit successfully landed on Mars Saturday night and immediately began transmitting images of its surroundings, a long-dried up lake bed where scientists are seeking evidence that life once existed on the red planet. Continue reading
Dec 24 Court Blocks Bush Administration Clean Air Act Changes A federal appeals court on Wednesday blocked new Bush administration changes to the Clean Air Act after numerous states and cities argued the new rules would harm the environment and public health. Continue reading
Dec 22 Watch Picturing Space: The Hubble Space Telescope For more than ten years, the Hubble Space Telescope has been helping scientists understand the variety of objects that make up the universe. NASA has plans to start launching its next generation of orbiting telescopes with even more powerful imaging… Continue watching
Dec 17 Watch Survival Battle: Salmon in the Pacific Northwest The presence of salmon in the waterways of the Pacific Northwest has been increasing in recent years, but the Bush administration and some scientists disagree over who can take the credit. Lee Hochberg reports that what the president says is… Continue watching
Dec 11 Watch Mike Leavitt: Environmental Protection Agency Administrator Former Utah Gov. Mike Leavitt became head of the Environmental Protection Agency in November. Since then, the agency has released two controversial proposals aimed at reducing emissions from power plants. Margaret Warner discusses these and other issues with the new… Continue watching
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