Scientists Say: Antimatter

Antimatter (noun, “AN-tee-MAT-ter”)

Antimatter is made of antiparticles. Think of antiparticles like partners of ordinary particles, but with the opposite properties.

You’ve likely heard of protons, neutrons and electrons. These are the tiny particles that make up atoms. But you may not have heard of their anti-twins. These are antiprotons, antineutrons and positrons.

Particles and antiparticl...