SpaceOdd radio circle in space may be supermassive black hole merger Astronomers have detected another mysterious signal called an odd radio circle, one of just five ever spotted, and one suggestion is that it is the result of supermassive black holes merging News
SpaceAvi Loeb interview: Could ‘Oumuamua be alien technology after all? Harvard astrophysicist Avi Loeb has drawn criticism for suggesting a weird object passing through the solar system could be an alien spacecraft. But he insists we must keep an open mind when nature throws us a curveball Features