Last December, astronomers caught sight of an extremely bright, extremely close gamma ray burst that lasted for a little under a minute — close as far as gamma ray bursts, anyways: about a billion light-years away. Ordinarily, it would be interesting, but nothing groundbreaking, something to be filed away with the tens of thousands of other long gamma ray bursts that have been observed over the past half-century. But then, something didn’t happen: the supernova required to create such a lengthy explosion was nowhere to be found.
