A recently-begun series exploring what makes us truly unique, as a species: The Ability To Be Disappointed in Any Situation. I'm really hard-pressed to think of any other species that demonstrates this? The capacity to imagine ahead of time how something is supposed to go, only to get there and compare it dismally with what we'd dreamed it could have been. Unless grasshoppers are doing this and we just can't perceive the expressions on their tiny faces. More along these lines soon.