Novedades

We humans have an extraordinary capacity for compassion—much of it in response to the atrocities we inflict on the planet, its animals, and each other. The popular explanation for this paradox is that we evolved as carnivorous “killer apes,” who gradually curbed our lust for violence (with frequent exceptions) by implementing humane social norms. This explanation is so well worn, especially in the American psyche, that it epitomizes cliché. So, we could be forgiven for believing it, when nearly every word is fiction.

We spend roughly a third of our lives in bed, but for millions of us, not all of that time is spent sleeping. We strive for eight hours per night, only to lie awake thanks to stress, our ever-present devices, a new baby, or that 4pm coffee you thought you needed. As sleep scientist and recovering insomniac Merijn van de Laar shows, we’re hardly the first to experience this. When homo sapiens evolved hundreds of thousands of years ago, when saber-toothed tigers were their biggest nighttime worry, wakefulness served to protect one’s tribe at night.