From the consistently awesome TED talks:

In a bang-up roundup talk, says New Yorker staff writer Michael Specter and author of a book called Denialism, tears into vaccine-autism claims, "Frankenfood" bans, the herbal cure craze. "All point to the public's growing fear (and, often, outright denial) of science and reason. He warns the trend spells disaster for human progress."

Specter also opens the talk with the right answer to the question: If you could go back to any time in history, or forward to the future, what would you do?