“Why the Sun Still Shines,” Edge Foundation, World Question Center (answer to Edge question: What is your favorite deep or elegant explanation?), 15 January 2012.
“Q.E.D. Moments,” Edge Foundation, World Question Center (answer to Edge question: What scientific concept would improve everyone's cognitive toolkit?), 15 January 2011.
“The Sample Mean,” Edge Foundation, World Question Center (answer to Edge question: What have you changed your mind about?), 1 January 2008.
“The Fuzzy 'Yin Yang' Equation,” Serpentine Gallery display of Equation Art, Edge Foundation (answer to Edge question: What is your equation?), 13 October 2007.