2015 Isaac Asimov Memorial Debate: Water, Water

Neil deGrasse Tyson hosts and moderates a panel of experts for a lively discussion about the past, present, and future of water on Earth on Tuesday, April 28, at 7 pm. Earth is the only place in our solar system with liquid water on its surface. Even though water makes up only 0.03 percent of the Earth’s total mass, it covers 70 percent of the planet’s surface. Where did this water come from? Why is it mostly in liquid form? Is water essential to all life in the universe?

Listen to a podcast of the program here.