The most energetic cosmic neutrino, or "ghost particle," ever recorded may be the remnants of a nearby black hole explosion.

Scientists trying to discover the elusive mass of neutrinos, tiny "ghost particles" that could solve some of the universe's biggest mysteries, announced a new limit on Thursday for how much they could ...

A detailed image reveals an unusual plasma jet structure, suggesting the presence of two merging supermassive black holes at ...

Even though high-quality X- and gamma rays with photon energy below mega-electron volt (MeV) are available from large-scale X-ray free electron lasers and synchrotron radiation facilities, it remains ...

Gamma-ray bursts are the most energetic phenomenon known to humankind. Although short-lived, they outshine stars and even galactic quasars. They usually display energies in the region of tens of ...

About 80 percent of the universe’s mass is thought to consist of dark matter. And yet, little is known about the composition and structure of the particles that make up dark matter, presenting ...

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Wood and fossil fuel reactions require oxygen for combustion to unleash the chemical energy stored in the fuel. The energy given off by these reactions, which is expressed in electron volts, is the ...