Researchers have spent the past few years watching a black hole re-awaken roughly 300 million light-years away from Earth.

If you were going to design an object to preserve mystery while being utterly troubling, you couldn't do much better than a black hole ... and the stronger the influence of gravity.

Now, this same black hole is once again captivating scientists with an extraordinary gamma-ray flare that’s emitted photons ...

A team of scientists has developed a recipe for black holes that eliminates one of ... of extremely strong gravity, probably far stronger than what we can hope to observe," Molina-Niñirola ...