[ThinkPlease]

A polypeptide of length 100.... ~0.0

Never say never. I'm still looking up the detection strength of the Glycine lines, and the density estimates. It's quite possible that there is more out there, we just can't detect it because there isn't enough of them to firmly detect.

[AndrewC]

Never say never. I'm still looking up the detection strength of the Glycine lines, and the density estimates. It's quite possible that there is more out there, we just can't detect it because there isn't enough of them to firmly detect.

Well, we can't detect bridge trolls so they must be hard to find.

Now the density of gaseous clouds is estimated to be 10,000 atoms(molecules)/cm³. Interstellar space is 0.1-1 atom/cm³.