Ira Flatow

A global team of computer users has cracked one of the remaining World War II messages encoded by the Nazi Enigma machine. Noah Adams talks to Ira Flatow, host of NPR's Talk of the Nation Science Friday, about how the code was broken -- and a serious risk to users of the program used to crack the encryption.

Nobel laureate Francis Crick, who along with James Watson uncovered the "double helix" spiral structure of DNA, died Wednesday at age 88. In 1953, the pair announced they had determined the structure of DNA, the molecule that carries the codes for genes. Hear NPR's Ira Flatow, host of Science Fridayand NPR's Noah Adams.

Host Steve Inskeep speaks with NPR's Richard Harris and NPR's Ira Flatow about information NASA presented today in a news conference from Houston on developments in the investigation of the space shuttle Columbia disaster.

Talk of the Nation/Science Friday host Ira Flatow joins host Steve Inskeep to talk about Columbia's scientific mission.

NPR's Ira Flatow and NPR's Steve Inskeep discuss the challenges in NASA's immediate and longterm future.

Talk of the Nation/Science Friday host Ira Flatow joins host Steve Inskeep to talk about how NASA has adapted since the 1986 Challenger disaster.