Scientists detect highest-energy ghost particle ever seen: The particle, a type of neutrino, arrived at Earth at nearly the speed of light and with 30 times the energy of the previous most energetic neutrino

The neutrino had an energy around 220 million GeV. For comparison, 1 GeV is just slightly more than the mass of a single proton or neutron, so this single neutrino had the same amount of energy or “weight” as many large proteins (thousands of hemoglobin complexes) or of a handful of small viruses like bacteriophages.