"There is a level of predictability to evolution."
Oceans provide a safe place for life to evolve.
Here, Tyson tackles the most important question ever: Are we alone?
This is what it takes for life to exist.
How exceptional is humanity?
He has strong feelings about whether or not they will enslave humanity.
No matter what, microbial hitchhikers will definitely be introduced to the Martian environment.
"If we can imagine it, it's probably out there on a planet somewhere."
"There are a lot of places that there could be life. Now the big question is, are they trying to make contact, or do they want us to try?"
We've done everything from sending radio messages, to providing maps, to simply watching and listening.
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