The magnum opus of particle physics is far from complete, requiring physicists to devise many alternatives—some weirder than others.

When molecules fall apart, their electric charge doesn't stay put—it rearranges as bonds stretch and break. An international team of scientists has now tracked these ultrafast changes in the small ...

The KM3NeT collaboration has traced the most energetic neutrino ever recorded back to a likely source: blazars, the supercharged jets fired by supermassive black holes directly toward Earth. The ...

Forces have mediator particles. Electromagnetism is mediated by the photons, for example. So most of the decay of this excited dark matter particle would be this unknown mediator. The excited state ...

The catastrophic collision of a black hole and a neutron star sent ripples across the universe. New analysis of those ripples could upend a major theory about how these extreme pairs form. When you ...

Neutrinos live in a lonely universe. Every second, millions of them pass through our planet, but they so rarely interact with other matter that they don’t leave much of a trace. The highest-energy of ...