The biggest stories of the day delivered to your inbox.

"Interestingly, the quasar powering this massive radio jet does not have an extreme black hole mass compared to other quasars." Astronomers have detected the largest black hole-launched jet ever ...

They can weigh billions of times the mass of our Sun (the largest being 66 billion solar masses), their collisions cause ripples in the very fabric of spacetime, and our concept of physics ...