Rarely does a speaker at a conference have to abandon a talk because he's seasick. But I saw it happen in August on a Scientific American/Bright Horizons cruise around the U. K. and Ireland, as our ship hit rough seas. The nauseated narrator finished his talk a few days later in calmer waters. And for the porpoises of this ocean-going column, all you need to know is that he was not Robert Sapolsky. I mean purposes.