After more than a decade of super-coordinated technical work, the astronomers of the Event Horizon Telescope—a global network of radio telescopes around the Earth—gave us the first picture of a Black Hole. It is a massive glob of what appears to be nothingness, 55 million light years away. Talk about unintended consequences. Einstein himself found the prediction of a Black Hole in his general theory of relativity implausible. In practice, these supermassive objects are our best laboratory for...