Wall Street Journal reporter Maria Abi-Habib made waves in journalistic circles last month after she posted on Facebook that Department of Homeland Security officials tried to seize her phones as she entered the U.S. at Los Angeles International Airport. What was striking about her post was that Homeland Security’s demand (which it eventually gave up) was probably lawful and …

  The newly discovered planet Proxima b is about to change the focus of astronomy for decades to come —and maybe longer, if it reveals signs of life. The planet, some 25 trillion miles away from our own, is like a twin to Earth, but one separated at birth and living a very different kind of life. The discovery, which …

  For a few decades, economists used to imagine how the world works, write down a theory describing their idea, and call it a day. If some statisticians came along and found some support for the theory, well, great! But usually they didn’t, and that was fine too. As one old joke put it, if an idea worked in practice, …