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Stephen Hawking - Finding Alien Worlds

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Description: Stephen Hawking explains how we search for alien worlds.

Into The Universe With Stephen Hawking - Aliens

This video belongs to Discovery Communications, LLC, and is being used for educational purposes only.
Tags: system, earth, science, life, physics, universe, stephen, into, astronomy, solar, professor, carl, aliens, cosmos, extraterrestrial, telescope, cosmology, sagan, hawking, theoretical, astrophysics, kepler, exoplanets
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