Gravitational wave hunters have picked up signals from the lightest black holes yet

The collaboration of scientists called LIGO — famously known for making the first ever detection of gravitational waves — has once again found these ripples in space-time, stemming from a pair of black holes violently merging many light-years away.On June 8th, LIGO’s two facilities in Louisiana and Washington picked up the wave signals from the two black holes, which spun around each other rapidly many times a second before colliding to form an even more massive black hole. Thi