"<a href=""https://www.youtube.com/watch?v=ZecQ64l-gKM&amp;t=57m17s"">57:17</a> "...counterintuitive idea that life elsewhere in the universe if very different from life here on Earth. And likely that each instantiation of life is very different from each other."<br>To me it is the exact opposite. Nothing gives me reason to think that life would be at all similar elsewhere in the universe. Considering the billions of evolutionary variables", possibilities, changes and mutations from inside the simplest cell level on up to and including their progression and organization, and to boot the planetary changes over these eons of time, I do not see that anything would or should be similar.