https://www.youtube.com/watch?v=TlAQLgTwJ_A
You must really hear Hazen's entire lecture, which starts @ 25:30 . His qualification of possible interactions is a little afterthought which is easy to miss. His lecture contains a wealth of secondary information, if you give close attention to every word.
Well I feel better now, Hazen didn't actually mention XNA.
But, I am getting a little caught up on XNA
XNA is synthetic DNA that's stronger than the real thing
Robbie Gonzalez
http://io9.gizmodo.com/5903221/meet-xna-the-first-synthetic-dna-that-evolves-like-the-real-thing
New research has brought us closer than ever to synthesizing entirely new forms of life. An international team of researchers has shown that artificial nucleic acids - called "XNAs" - can replicate and evolve, just like DNA and RNA.
We spoke to one of the researchers who made this breakthrough, to find out how it can affect everything from genetic research to the search for alien life. ...
Every organism on Earth relies on the same genetic building blocks: the the information carried in DNA. But there is another class of genetic building block called "XNA" — a synthetic polymer that can carry the same information as DNA, but with a different assemblage of molecules.
The "X" in XNA stands for "xeno." Scientists use the xeno prefix to indicate that one of the ingredients typically found in the building blocks that make up RNA and DNA has been replaced by something different from what we find in nature — something "alien," if you will. ...
Oh and I agree, that's a fantastic talk by Hazen, I've listened to it a number of times, but not as many as you.