by Mark O. Mar­tin — A few weeks ago, I wrote a short Small Things Con­sid­ered es­say de­scrib­ing the di­verse roles that odors can play in mi­cro­bi­ol­ogy. Ar­ti­cles here and there writ­ten by oth­ers at­test to a grow­ing in­ter­est in so­ciomi­cro­bi­ol­ogy. As for my­self, I have long sus­pected that mi­crobes are con­stantly send­ing and…