A Mysterious Signal Reached Us From When The Universe Was Just 3 Billion Years Old. Its Home Galaxy Surprised Astronomers.

Sometimes we receive strange, ghostly radio signals from outer space, which astronomers have yet to conclusively explain.  Partially because they disappear almost as soon as they arrive. The ephemera known as fast radio bursts (FRBs) are among the Universe's most mysterious occurrences, even more eerie than the supposed little green aliens with a penchant for physical probes. If they were related, that would neatly solve two major mysteries. But FRBs are bursts of radio waves from the distant cosmos, generally lasting for tiny fractions of a second (i.e., fast). Their transience, and the fact that they randomly appear across the sky, have made it difficult to pin down their origins for nearly two decades since their discovery in 2007.