In 2019, Breakthrough Listen picked up strange radio waves from Proxima Centauri, the closest star to our Sun. The signal, names BLC-1, looks like a technosignature that scientists are on the look out for. These signals are in a very narrow range of radio frequencies that humans use to communicate. They also have a “drift” that show the source is moving, like a planet. Scientists believe BLC-1 could be coming from something on Earth. Or it could be a signal from a new space object. But so far, the source is unknown. And even a hint that life could be beyond Earth has alien hunters excited.