Focus guest host Bill Hammack spoke to Theo Gray, author of "The Elements: A Visual Exploration of Every Known Atom in the Universe". In addition to the bound version of the book, Gray is releasing a visually-stunning e-book version on the iPad. After his interview on Focus, Theo showed off the iPad application.

(Produced by Sean Powers, WILL)

Listen to the interview from September 29, 2010 on Illinois Public Media's Focus.
will.illinois.edu/focus/interview/focus100929a/

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