Ghost particle from 3.7bn light years away found in South Pole
Scientists have detected high-energy neutrinos, which travelled from nearly 3.7 billion light years away, in the ice below Antarctica's surface. The particles are nicknamed 'ghost particles' as they are uncharged, causing their paths and trajectories to remain unaffected by magnetic fields. The particles are said to have originated from an elliptical galaxy with a massive black hole at its core.