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Andrew Chaikin explains why humans need to follow in the footsteps of their robotic emissaries and travel to Mars. (05:42)
Sending senior citizens on an all-expense paid, one-way ticket to oblivion will reduce the deficit without raising taxes. (05:28)
Stephen competes with Russia by placing his intern, Jay, in a state-of-the-art gym locker for 519 days. (02:29)
Bob Park doesn't understand why humans need go to space when robots can do a better job. (05:14)
In honor of Earth Day, Stephen participates in a little interplanetary trash talk. (2:05)