12.22 – Secrets of the Exoplanets (11.29.19)

Over the past 20 years, thousands of potentially habitable exoplanets have been discovered outside our solar system. Could some of them be home to intelligent extraterrestrial life? Perhaps even alien beings that have visited Earth?

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Who were they?… Why did they come?… What did they leave behind?… Where did they go?… Will they return?…

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