Harold Evans is an editor and author of two critically acclaimed best-selling histories of America: The American Century and, most recently, They Made America: From the Steam Engine to the Search Engine: Two Centuries of Innovators. In 2004 he was honored with a knighthood in the Queen's 2004 New Year's Honors list. read more

Daniel Gilbert is Professor of Psychology at Harvard University. He is the author of the best-selling book, Stumbling on Happiness, which has been translated into 30 languages. His research focuses on prospection — the ability to imagine oneself in the future — and the mistakes people make when they attempt to predict their hedonic reactions to future events. read more

Warren Meck is Professor of Psychology and Neuroscience at Duke University. An internationally recognized expert on time perception, Prof. Meck’s research explores the neural basis of the “internal clocks” humans and other animals use to time events in seconds, minutes, and hours. read more

Neurologist Oliver Sacks has spent a lifetime exploring a vast array of human experience – from Tourette's syndrome and autism to phantom limb syndrome and schizophrenia. His many best-selling books include Uncle Tungsten, The Man Who Mistook His Wife for a Hat, and Awakenings, which became an acclaimed film. Sacks is a professor of neurology and psychiatry at Columbia University Medical Center and a Columbia University Artist. His writings appear regularly in The New Yorker and The New York Review of Books. read more