Joseph Formaggio explains the discovery that the ghostly particle must be no more than 1 electronvolt, half as massive as previously thought.
The “ghostly particle” is confirmed to have originated from a blazar, nearly 4 billion light years from Earth.
Data could shed light on why the universe has more matter than antimatter.
Exotic metal displays behavior that could lead to new infrared detectors.
If discovered, sterile neutrinos may explain dark matter.
Neutrinos traveling 450 miles have no individual identities, according to MIT analysis.