Do you think human beings will ever inhabit a planet besides Earth?

Asked at Massachusetts Street on April 25, 2007

“Yes. I think if we're given an infinite time frame, the possibilities should be infinite.”

“No. I don't think we have enough time left on this planet to accomplish that.”

“I'm going to say yes. I think our urge to explore is an irresistible part of the human makeup.”

“No. I think people are going to destroy the world before that can happen.”