“Among the archaebacteria, the genome that is most similar to yeast at all thresholds is that of the methanogen Methanosarcina mazei.”
“In this regard, both the phylogeny and function of archaeal selenoproteins are consistent with the argument that the archaeal ancestor was a methanogen.”
“They've also developed a vaccine injection that produces methanogen antibodies in saliva, which would then travel into the rumen.”