David Kestenbaum David Kestenbaum is a science correspondent for NPR. His job allows him to combine his extensive background in physics with his love of broadcast journalism.
Searching the Sky for Alien Laser Messages
Louisiana Levee Critics Now Less Critical
NASA Announces Plan to Hit Moon in 2008
Engineers Blamed in New Orleans Levee Failure
Panel's Report Assigns No Blame in Levee Failures
Army Builds Mini New Orleans to Study Levees
Model Attempts to Recreate New Orleans Levee Failure
Economists Learn from Game Show 'Deal or No Deal'
Utah Site Gets License for Nuclear Waste Repository
E-Mail Encryption Rare in Everyday Use
Report: Nuclear Waste Transport Poses Few Risks
Stopped Clocks Tell Tale of Katrina Flooding
The Challenger Shuttle Tragedy, 20 Years Later
DuPont Agrees to Reduce Use of Teflon Chemical