The Doomsday Clock has just moved forward; we are now two minutes to midnight. Scientists created the clock in the 1940s as a way or demonstrating how close they think we are to the possible extinction of the mankind. Their predictions are based on threats of nuclear war, climate change, and more. So why are we the closest to midnight since 1953? Our experts share their insight. Our guests: Tom Weber , assistant professor of earth and environmental sciences at the University of Rochester Wes