“If you ever feel lazy or dull,” neuroscientist David Eagleman wrote of the human brain, “take heart: you’re the busiest, brightest thing on the planet.” But are you, or at least are you for long?

Much has been said about the perils of information overload and what we can do about it. But what if the issue was not simply one of will over wiring? In The Ravenous Brain: How the New Science of Consciousness Explains Our Insatiable Search for Meaning (public library) — which also gave us this fascinating look at the science of “chunking” and how pattern recognition fuels creativity — Cambridge neuroscientist Daniel Bor turns to the potential hard-wired limitations of our human brains as they grapple with the rapidly proliferating influx of available information:

Human eyes have around 100 million photoreceptors, each of which can pick up about ten visual events every second, so our eyes are effectively receiving a billion pieces of information each second. If you include the information pouring in from our other senses, that’s a staggering quantity of data for our brains to sift through every moment of our waking lives.

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If we had an infinite resource of energy by which to crunch the numbers, and an infinitely fast brain by which to make the calculations, then there would be no problem, as we could analyze every scrap of data to its fullest capacity and never miss an opportunity or be caught by a threat. But, of course, in reality, it takes time to process anything, and human brains consume a frighteningly large proportion of our body’s total energy resources.