PhysicsPhysicists Trapped a Particle of Antimatter And Kept It Caged For Months Posted on October 28, 2026 by Administrator The Universe, according to theory at least, should not exist. Every particle in the Universe has a corresponding antimatter counterpart. Should ever a pair of such particles meet, they would immediately cancel each other out – annihilated in a tiny puff of energy. Theoretically, the birth of the Universe should have produced equal quantities of particles and antiparticles.