Slate: Illuminating Answers to Environmental Questions: Is a Used Guzzler Green Than a New Hybrid? Are Electric Hand Dryers Really More Efficient Than Paper? Get Answers Here. (washingtonpost.com, July 10, 2008; 10:00 AM)
 
Transcript: Science: Hubble Telescope (washingtonpost.com, July 7, 2008; 11:00 AM)
 
Monday, June 23, 11 a.m. ET: Science and Medicine: Brain Chemistry (washingtonpost.com, June 23, 2008; 11:00 AM)
 
Transcript: Science: Physics of a Crane Collapse (washingtonpost.com, June 16, 2008; 2:00 PM)
 
Transcript: Science: Worker Burnout and Taking Risks (washingtonpost.com, June 9, 2008; 1:00 PM)
 
Transcript: Science: Department of Human Behavior (washingtonpost.com, June 2, 2008; 1:00 PM)
 
Transcript: Science: Search for Life on Mars (washingtonpost.com, May 19, 2008; 1:00 PM)
 
Science: Environment News: Saving the Frog Population; McCain's Environment Policy (washingtonpost.com, May 12, 2008; 2:30 PM)
 
Transcript: Science: Bird Migration (washingtonpost.com, May 5, 2008; 12:00 PM)
 
Transcript: Science: Mars Discovery (washingtonpost.com, April 28, 2008; 2:00 PM)
 
Transcript: 'Earth: The Sequel' (washingtonpost.com, April 25, 2008; 12:00 PM)
 
Thursday, April 24 at 11 a.m. ET: 'Gusher of Lies' (washingtonpost.com, April 24, 2008; 11:00 AM)
 
Transcript: Study: Life Expectancy Is Dropping (washingtonpost.com, April 22, 2008; 11:00 AM)
 
Transcript: Science and Medicine: Can Hormones Impact Wall Street? (washingtonpost.com, April 21, 2008; 11:00 AM)
 
Transcript: Science: Choosing a Mate (washingtonpost.com, April 14, 2008; 11:00 AM)
 
Transcript: Science and Medicine: Cell Technology (washingtonpost.com, April 8, 2008; 11:00 AM)
 
Transcript: Al Gore's New Climate Campaign (washingtonpost.com, March 31, 2008; 12:00 PM)
 
Transcript: Science: Exoplanets (washingtonpost.com, March 24, 2008; 12:00 PM)
 
Transcript: Science: History of Cats (washingtonpost.com, March 17, 2008; 1:00 PM)
 
Transcript: Science: Electronic Senses (washingtonpost.com, March 10, 2008; 1:00 PM)
 
Transcript: Drinking Water Contamination (washingtonpost.com, March 10, 2008; 10:45 AM)
 
Monday, 1 p.m. ET: Science and Medicine: Relationships (washingtonpost.com, March 3, 2008; 1:00 PM)
 
Doomsday Vault: Live Discussion From Norway (washingtonpost.com, February 26, 2008; 12:00 PM)
 
Transcript: Science: Telescopes on the Far Side of the Moon (washingtonpost.com, February 26, 2008; 11:00 AM)
 
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