May 21 EPA Chief Christine Whitman Steps Down Christine Todd Whitman, head of the Environmental Protection Agency, is leaving her post after more than two years. Continue reading
May 21 Watch Christine Todd Whitman Leaving the EPA Christine Todd Whitman, head of the Environmental Protection Agency, is leaving her post after more than two years of highly charged debates that often put her at odds with others in the Bush administration. Experts examine President Bush's environmental record… Continue watching
May 20 Watch Researching SARS Susan Dentzer looks at how scientific research is contributing to the struggle against SARS. Continue watching
May 06 Watch Shuttle Columbia Probe Ray Suarez reports on the findings and remaining questions in the space shuttle Columbia disaster investigation and then follows up in a discussion with Jerry Grey of the American Institute of Astronautics and Donna Shirley of the University of Oklahoma. Continue watching
Apr 25 Watch DNA’s 50th Anniversary Margaret Warner discusses DNA with Eric Lander, director of the Whitehead Institute's Center for Genome Research in Cambridge, Massachusetts, and a representative of the Human Genome Project. Continue watching
Apr 12 Watch Scientist Surrenders: General Amer Hammoudi al-Saadi The top scientific adviser to Saddam Hussein, General Amer Hammoudi al-Saadi, surrendered to U.S. forces in Baghdad Saturday. Continue watching
Feb 27 Watch Shuttle Columbia: The Search for Answers Investigators continue to look for answers to the space shuttle Columbia disaster. Terence Smith discusses the latest evidence with Anthony Weiner, a member of the House science committee; and Lori Garver, a former associate administrator for policy and plans at… Continue watching
Feb 26 E-mails Indicate NASA Worried About Columbia Crew’s Survival NASA engineers worried a day before the Space Shuttle Columbia disintegrated upon re-entry that the shuttle's wing might burn through, leading to a breakup of the craft -- a message they did not communicate to senior NASA officials. Continue reading
Feb 21 NASA Officials Discussed Damage Before Columbia Disaster Days before the space shuttle Columbia disintegrated a NASA official warned that damage sustained during takeoff may have been enough to allow super-heated air to breach its left landing gear door. Continue reading
Feb 13 Watch Shuttle Columbia: Search for Answers NASA released copies of an e-mail by one of their engineers, which warned of catastrophic consequences to the shuttle Columbia from the piece of foam insulation that struck the shuttle during liftoff. Ray Suarez discusses the investigation and NASA's safety… Continue watching