Be Smart

Is There Intelligent Life Beyond Earth?

Season 1 Episode 21 | 7m 51s

Now that we know planets are common in our galaxy, how would we tell if one holds life? Sure, it will take incredibly powerful telescopes and ambitious new space missions, but what are we looking for? What are we listening for? How do we help other worlds know that we are here?

Aired: 12/09/13

Rating: NR


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