by Elio — When one cell meets an­other, it must make de­ci­sions. This ex­tends it­self to prac­ti­cally every at­tribute of liv­ing things, from avoid­ing mat­ing with self to the es­tab­lish­ment of ter­ri­to­r­ial bound­aries. Do we fuse? Will you at­tack me? Are you a po­ten­tial mate or are you lunch? And, in the bod­ies…