A team of international astronomers believe that they might have detected light from a black hole merger, for the first time ever. This unprecedented event was noted by scientists at Caltech’ Zwicky Transient Facility (ZTF) in California after studying gravitational waves and electromagnetic radiation from the collision of two black holes. https://gadgets.ndtv.com/science/news/black-hole-collision-light-detected-s190521-j1249-3449-study-2252715#rss-gadgets-science