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Talking book description
In a special section on the search for extraterrestrials, "Where Are They?" explores how likely alien civilizations are to exist, and "Where They Could Hide" discusses the fact that no SETI program has ever found a verifiable alien radio signal. In "Intergalactically Speaking, " the vastness and vagaries of space will force interstellar correspondents into extreme measures, if we are to make a credible search for extraterrestrial life. These articles originally appeared in Scientific American for July 2000.

Talking book description
In a down-to-earth article, Irwin Goldstein and the Working Group for the Study of Central Mechanisms in Erectile Dysfunction raise the issue of "Male Sexual Circuitry." They reveal that brain is the most important sex organ and what goes on below the belt starts inside men's heads. This article originally appeared in Scientific American for August 2000.

Talking book description
The Semantic Web is certain to spark lots of debate; the father of the World Wide Web, Tim Berners-Lee, along with James Hendler and Ora Lassila, predict the next step in the development of the Web. This article originally appeared in the May 2001 issue of Scientific American .

Talking book description
A brilliant ensemble of the world's most visionary scientists provides 25 original never-before-published essays about the advances in science and technology that we may see within our lifetimes. Theoretical physicist and best selling author Paul Da…