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Editor's note: In her article, " Goldilocks Black Holes ," Jenny E. Greene discusses the search for black holes with masses ranging from roughly 1,000 suns to a million suns--middleweights on the cosmic scale.

Scientists have discovered the largest black holes yet, and they're far bigger than researchers expected based on the galaxies in which they were found. [More]

A team of University researchers will get their hands on some of Europe’s fastest supercomputers in a bid to crack Einstein’s theory of relativity and help describe what happens when two black holes collide.

It's the source of a long-standing cosmological quandary. Galaxies or black holes: Which came first?

By creating space-like conditions in a slim 4m vessel, Italian researchers have helped confirm the behaviour of astrophysical jets – streams of charged particles shot out by supermassive black holes and young stars, which stretch several hundred thousand light years across space.

(PhysOrg.com) -- When black holes slam into each other, the surrounding space and time surge and undulate like a heaving sea during a storm. This warping of space and time is so complicated that physicists haven't been able to understand the details of what goes on -- until now.

Black holes are some of the heaviest objects in the universe. Electrons are some of the lightest. Now physicists at the University of Illinois at Urbana-Champaign have shown how charged black holes can be used to model the behavior of interacting electrons in unconventional superconductors.