From LIGO http://status.hackerposse.com/url/22182 on Twitter: We think the larger of our #GW190521 #BlackHoles, at 85 solar masses, is too large to have formed through collapse of a massive star. So how did this "impossible" #BlackHole form? This video, from @ARC_OzGRav, looks at some of the possibilities http://status.hackerposse.com/url/22183 http://status.hackerposse.c…