black circle

‘Supercharged rhino’ black holes may have formed and died a second after the Big Bang

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Small, primordial black holes that formed in the first fraction of a second after the Big Bang may have had company, in the form of even smaller supercharged black holes with the mass of a rhinoceros that quickly evaporated. A team of researchers has theorized that these tiny rhino black holes, which would represent an … Read more

The swirling spacetime and destroyed stars help reveal how fast supermassive black holes spin

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The ‘wobbly’ remains of a star that died a gruesome death in the maw of a supermassive black hole have helped reveal the speed at which its cosmic predator spins. Supermassive black holes are believed to form from successive mergers of smaller black holes, each of which brings with it an angular momentum that accelerates … Read more