by Elio — In the cel­e­brated novel 'The Rebel An­gels', the famed Cana­dian au­thor Robert­son Davies men­tions Ozias Froats, a fic­tional pro­fes­sor po­ten­tially on his way to a No­bel Prize for dis­cov­er­ing that everyone's fe­ces re­flect the maker's per­son­al­ity. He did not have today's ready re­course to metage­nomics (that be­ing still in the fu­ture)…