Episode 3

One hundred years ago, the first humans reached the South Pole of this planet. More than 40 years ago, man first walked on the moon. When will our species first set foot to explore the planet Mars? Kevin Fong seeks a likely launch date. He asks who will get us there and why we really need to explore the Red Planet. (Image: An image, released by NASA, of the terrain of Mars taken by the Curiosity rover. Credit: AP Photo / NASA / JPL-Caltech / MSSS)