Discover, March 25, 2019

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I am going to do my best to hold your attention until the very last word of this column. Actually, I know it’s futile. Along the way, your mind will wander off, then return, then drift away again. But I can console myself with some recent research on the subject of mind wandering. Mind wandering is not necessarily the sign of a boring column. It’s just one of the things that make us human.

Everybody knows what it is like for one’s mind to wander, and yet, for a long time psychologists shied away from examining the experience. It seemed too elusive and subjective to study scientifically. Only in the past decade have they even measured just how common mind wandering is. The answer is very.

Continue reading “In Praise of Mindless Time” →

Discover, March 25, 2019

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I was looking forward to my first experience with anesthesia. I had been laid out on a stretcher, and nurses and doctors were prepping my midsection so they could slice it open and cut out my appendix. After a bout of appendicitis, a short vacation from consciousness seemed like a pleasant way to spend a few hours. I had no idea what anesthesia would actually feel like, though, and suddenly I was seized by skepticism. I tried to hoist myself up, already swabbed in iodine, as I suggested that I ought to pop into the men’s room before the scalpels came out. I wouldn’t want to interrupt the surgery with a bathroom break. “Don’t worry,” one of the nurses replied. “We’ll do that for you.”

Continue reading “The Big Sleep” →

Discover, March 24, 2019

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On April 11, 1944, a doctor named T. C. Erickson addressed the Chicago Neurological Society about a patient he called Mrs. C. W. At age 43 she had started to wake up many nights feeling as if she were having sex—or as she put it to Erickson, feeling “hot all over.” As the years passed, her hot spells struck more often, even in the daytime, and began to be followed by seizures that left her unable to speak. Erickson examined Mrs. C. W. when she was 54 and diagnosed her with nymphomania. He prescribed a treatment that was shockingly common at the time: He blasted her ovaries with X-rays.

Continue reading “The Look of Lust” →

The New York Times, September 4, 2018

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In a study carried out over the summer, a group of volunteers drank a white, peppermint-ish concoction laced with billions of bacteria. The microbes had been engineered to break down a naturally occurring toxin in the blood.

The vast majority of us can do this without any help. But for those who cannot, these microbes may someday become a living medicine.

The trial marks an important milestone in a promising scientific field known as synthetic biology. Two decades ago, researchers started to tinker with living things the way engineers tinker with electronics.

Continue reading “Scientists Are Retooling Bacteria to Cure Disease” →

The New York Times, August 2, 2018

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In 2003, researchers digging in a mountain cave on the Indonesian island of Flores discovered astonishing fossils of a tiny, humanlike individual with a small, chimp-sized brain. They called the species Homo floresiensis.

These relatives of modern humans stood just over three feet tall. Several villages in the area, scientists noted, are inhabited by people whose average height is 4 feet 9 inches.

Was this the result of interbreeding long ago between taller modern humans and shorter Homo floresiensis? Fifteen years after the bones’ discovery, a study of the DNA of living people on Flores has delivered a verdict.

Continue reading “Bodies Keep Shrinking on This Island, and Scientists Aren’t Sure Why” →