The Cost of Smarts

Research on animal intelligence always makes me wonder just how smart humans are. Consider the fruit-fly experiments described in Carl Zimmer’s piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly tended to live shorter lives. This suggests that dimmer bulbs burn longer, that there is an advantage in not being too terrifically bright.

Intelligence, it turns out, is a high-priced option. It takes more upkeep, burns more fuel and is slow off the starting line because it depends on learning — a gradual process — instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to stop.

Is there an adaptive value to limited intelligence? That’s the question behind this new research. I like it. Instead of casting a wistful glance backward at all the species we’ve left in the dust I.Q.-wise, it implicitly asks what the real costs of our own intelligence might be. This is on the mind of every animal I’ve ever met.

Every chicken that looks at you sideways — which is how they all look at you — is really saying what Thoreau said less succinctly: you are endeavoring to solve the problem of a livelihood by a formula more complicated than the problem itself. Thoreau himself would not dispute that he was hoping to recover the chicken’s point of view. He went to Walden Pond “to remember well his ignorance.”

Research on animal intelligence also makes me wonder what experiments animals would perform on humans if they had the chance. Every cat with an owner, for instance, is running a small-scale study in operant conditioning. I believe that if animals ran the labs, they would test us to determine the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really for, not merely how much of it there is. Above all, they would hope to study a fundamental question: Are humans actually aware of the world they live in? So far the results are inconclusive.
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