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Mars Exploration The planet Mars could be the place human space explorers head next. But the danger -- not to mention the expense -- leads many researchers to question how much humans can do when they get there that a well trained robot couldn't. David Kestenbaum reports on the dream and the downside of human space exploration.

All Things Considered

Mars Exploration

Heard on All Things Considered

Mars Exploration

Audio will be available later today.

The planet Mars could be the place human space explorers head next. But the danger — not to mention the expense — leads many researchers to question how much humans can do when they get there that a well trained robot couldn't. David Kestenbaum reports on the dream and the downside of human space exploration.