Building experimental evidence suggests that the electron, muon and tau may feel different forces. When the tau lepton was discovered in the 1970s, it didn’t resolve any outstanding mysteries—it ...

In the world of particle physics, you are never alone — quite literally. Every moment there is an invisible rainstorm of subatomic particles falling down on us from space. Unlike the kind of matter we ...

Highly energetic: visualization of the light gathered from the 2.6 PeV event in IceCube. The image shows a portion of the vertical strings of photomultipliers that make up the detector array.