Alien biochemistry

[stevebowers]

I did mention chirality in the post you quoted; there is some evidence that L-DNA and lefthanded biochemistry is favoured naturally, since some of the amino acids found in carbonaceous chondrite meteors have a bias towards left-handedness. But that might be a local phenomenon, possibly originating in our star's formation cloud or in the cluster we originated in. The conditions in other solar systems or clusters might favour right-handedness.