Bruce Cork, Glen Lambertson, Oreste Piccioni, William Wenzel) has identified the antineutron, which differs from ordinary neutrons in the opposite direction of its magnetic field. Like the ...

Strange matter Illustration of how antihyperhelium-4 – a bound state of two antiprotons, an antineutron and an antilambda – is created in lead–lead collisions at CERN. (Courtesy: CERN/ J Ditzel with ...

The first simple antimatter nucleus (an antiproton stuck to an antineutron) was discovered a few decades later. In 1995, scientists at the CERN particle accelerator finally filled in the first ...