Besides stars, the United States Navy uses quasars as beacons. Quasars are distant galaxies with supermassive black holes, surrounded by ... X-Ray Flashes from a Nearby Supermassive Black Hole ...

This week, we've seen a rescue dog who couldn't fathom why he was being given a treat and a New York City cat enjoying the outdoors for the first time ever. We have also been enjoying readers ...