The researcher Tadeusz Kawecki ponders the question “why don’t all animals get smart?”

Why do animals learn and why can some animals learn better than others? The research of Dr. Kawecki shows that learning and memory can be detrimental to health. It can even shorten your life - that is if you are a fly. Even the act of learning itself seems to shorten the life.

And what about us, humans? Even at rest, our brain consumes 20 percent of the body’s energy. And what else? (from nytimes.com)

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