A few days ago, the value of all the bitcoins in the world blew past $1 billion for the first time ever. That’s an impressive achievement, for a purely virtual currency backed by no central bank or other authority. It’s also temporary: we’re in the middle of a ...

When bullies grow up, who do they become? The Revenge of the Nerds theory is that they peak in high school, or even middle school, and then surrender power to the more socially awkward but smarter kids whose lives they made miserable. Another is that popular kids maintain ...

The first time I interviewed Ezra Klein, the 28-year-old prince of D.C. media, he brought me a sandwich: prosciutto on a poppy-seed baguette. (Also, chips and a beverage.) We were in the back of a chauffeured black town car, sent by the Washington Speakers Bureau, to take Klein ...