Antimatter captured.
This event display from the ATHENA experiment at CERN shows an antihydrogen atom that has annihilated after striking the wall of the Penning trap (centre, not shown). The nucleus of the anti-atom - the antiproton - annihilates into four charged pions (yellow tracks) that are detected with silicon microstrips (pink), while the positron annihilates into two back-to-back photons (red tracks) that are detected by caesium-iodide crystals (red cubes).