A detail photos of Alessandra Luchini's lab on the George Mason University campus on Monday, April 30, 2012 in Manassas, Va. (Kevin Wolf/AP Images for LaPresse)

Associated Press
A detail photos of Alessandra Luchini's lab on the George Mason University campus on Monday, April 30, 2012 in Manassas, Va.  (Kevin Wolf/AP Images for LaPresse)
A detail photos of Alessandra Luchini's lab on the George Mason University campus on Monday, April 30, 2012 in Manassas, Va. (Kevin Wolf/AP Images for LaPresse)
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