Our big brains have long been hailed as our greatest asset. We are smart, have conquered almost every corner on Earth, manipulated our habitat to suit us, and are developing increasingly-innovative technology to make our lives easier. Without our brains, none of these things would have been possible. Though they are costly organs – they require a great deal of energy to power – humans are living proof that the cost can pay off, biologically speaking. We have managed to find ways to overcome the added burden it has taken to evolve ever-bigger brains.
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