For a decade, gravitational-wave observatories have been detecting collisions between black holes across the Universe. Now, after analysing more than 150 binary black hole mergers, researchers have found evidence that these collisions can be divided into at least three distinct families, each with different characteristics and potentially different origins.  The study, led by postdoctoral fellow Dr Sharan […] The post Scientists uncover three branches of the black hole family tree appeared first on OzGrav .