Antimatter

Antimatter extends the concept of the antiparticle to matter, whereby antimatter is composed of antiparticles in the same way that normal matter is composed of particles. For example an antielectron (positron) and an antiproton could form an antihydrogen atom in the same way that an electron and a proton form a normal matter hydrogen atom.

Antimatter is not found naturally, except very briefly and in ephemerally small quantities. This is because antimatter which comes to exist outside the confines of a suitably equipped physics laboratory would inevitably come into contact ordinary matter, and be annihilated. Antiparticles and some stable antimatter (such as antihydrogen) can be made in minuscule amounts, but not in enough quantity to do more than test a few of its theoretical properties.

Puma-Dyne labs has developed an experimental antimatter powered engine that was “borrowed” by the SWAT Kats and used to intercept an invading alien force.