It's the ultimate buddy movie. Forty years ago, on November 19, 1969, astronauts Pete Conrad and Alan Bean landed on the moon in one of the most important of the Apollo flights.
 | 10th Planet  | 5:00 | A stunning discovery at the far reaches of our solar system... |
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 | Dark Matter  | 13:00 | Turns out most of the universe is held together by a... |
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 | Life on Mars?  | 3:14 | The Phoenix lander is sent to Mars to search the arctic plains... |
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| |  | Origins  | 50:00 | How did the colossal forces of the early universe make it... |
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|  | Pulsar Planets  | 3:11 | If pulsar planets could support life, it would be a life filled... |
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 | Space Elevator  | 11:41 | Can we build a 22,000-mile-high cable to transport cargo and... |
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