Are we alone in the universe? That's the question Astrobiologist Dr. Graham Lau spends every day trying to answer. In this in-depth interview, we talk finding life on other planets, Shadow Biospheres here on Earth and what happens if we find intelligent life - or it finds us. Then, because we all have that only sketchy cousin, we countdown the Top 5 Annoying Family Members.
Astrobiologist/Cosmobiologist Dr. Graham Lau: 02:19
John Shull: 43:36
Top 5: 57:31
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