Possible Detection of a Black Hole So Big It ‘Should Not Exist’

By Natalie Wolchover Black hole physicists have been excitedly discussing reports that the LIGO and Virgo gravitational-wave detectors recently picked up the signal of an unexpectedly enormous black hole, one with a mass that was thought to be physically impossible. “The prediction is no black holes, not even a few” in this mass range, wrote Stan Woosley, an …