Antimatter neutrinos detected from a nuclear reactor 240 km away

Antimatter neutrinos created by a nuclear reactor were picked up by a detector located 240 kilometres away. The approach could be used to monitor nuclear activity from afar.

The universe is full of neutrinos and their antimatter counterparts called antineutrinos. They are commonly produced inside the sun and in nuclear reactors, but detecting them is difficult because they typically move through matter without affecting it. Despite this, Josh Klein at the University of Pennsylvania and his colleagues managed to record …