by Elio — We some­times make a sally into the high jinks of meta­zoans, per­haps to per­suade you that we are not prokary­otic chau­vin­ists (not that you thought so, surely). This foray con­cerns a novel strat­egy that sheds light on an ap­par­ent para­dox: many prey, in­stead of mak­ing them­selves hard to see, seem to use tac­tics that...