Humans On Mars: NASA on the Defensive

Humans are landing on Mars all the time in Hollywood movies, with even more scheduled to do so this month. But when will astronauts really go to Mars? To hear NASA Administrator Daniel Goldin tell it, really soon. “We’re going to be in space forever with people first circling this globe, and then we’re going on to Mars, back to the Moon, and [on to] bases on asteroids,” Goldin said Tuesday, on the occasion of the launch of the first full-time crew to the International Space Station. But NASA