Napoleon’s legacy: ashes, tombs and DNA

In perhaps the same way that Americans prattle on about the assassination of John F. Kennedy, the French never tire of the death of Napoleon Bonaparte. In fairness, the circumstances surrounding the Little Corporal’s later years, death and burial are…unusual. At age 46, he was exiled to the godforsaken island of St. Helena. He was […]

It Started with a Cat Bite

This is the story of Massachusetts General Hospital case #31-2010: a 29-year-old woman whom I’ll call Melissa. I’m telling Melissa’s story not for its common-sense lesson—avoid interactions with cats*—but because it shows that doctor detective-work happens outside of TV Land. Melissa was a veterinary assistant at an animal hospital. One day, at work, a cat […]

The Brain’s Dark Energy

In the mid-1990s, neuroscientist Marcus Raichle noticed something funny going on in some of his brain-scanning experiments. Here’s what usually happens, more or less: someone lies inside of the scanner and performs a specific task, like pressing a button. In response to that particular task, some parts of the brain become more active. Voilà: you […]

Stress Factors

At 5:04 p.m. on October 17, 1989, two decades after he served as a combat soldier in Vietnam, Lance Johnson felt the tremors of San Francisco’s Loma Prieta Earthquake from his apartment in Marin County. He took his cup of coffee to the couch, switched on the news and saw a live feed of the […]