The author of Breaking the Spell (Viking, 2006), Freedom Evolves (Viking Penguin, 2003) and Darwin's Dangerous Idea (Simon &Schuster, 1995), is University Professor and Austin B. Fletcher Professor of Philosophy, and Co-Director of the Center for Cognitive Studies at Tufts University.

A biology professor at the University of Minnesota Morris and the author of the Pharyngula science blog. In 2006, the journal, Nature, listed his blog, Pharyngula, as the top-ranked blog written by a scientist. Recipient of the Humanist of the Year award in 2009, and the International Humanist Award in 2011.

A leading voice for humanism, Fred Edwords is recognized as an outstanding lecturer, debater, and inspirational speaker on human rights, humanist philosophical issues, and humanist lifestyle concerns. He serves as national director of the United Coalition of Reason and the International Darwin Day Foundation.

American skeptic, evolutionary bilogist, and atheist blogger. Jen is a graduate student at the University of Washington. She is the architect of Boobquake, contributor to the Atheist Guide to Christmas, and Vice Chair of the Board of Directors of the Secular Student Alliance.