300 Foxes and a Donkey's Jawbone
Intermediate Mass Black Holes
The most massive black hole collision ever detected has been directly observed by the LIGO and VIRGO Scientific Collaboration, which includes scientists from The Australian National University (ANU).
We still don’t understand a lot of things about black holes, which hover at the very edge of our scientific knowledge.
GW190521 is a gravitational wave detection from May 21, 2019 which was so unusual that scientists had to spin it as a mammoth collision of impossible black holes.