Foraging aggressively, moving from berries to roots to meat and back to fruit, better ensured that they got what they needed in the way of vitamins and minerals to thrive. And the best way to encourage that kind of restlessness was for them to get bored with eating the same old thing. We’ve inherited this boredom trait, referred to by food scientists as sensory specific satiety. It’s a trip signal in our brain, through which we get the feeling of being full when we have too much of one taste or smell or flavor.
