Does anti-matter exist?
Antimatter sounds like the stuff of science fiction, and it is. But it’s also very real. Antimatter is created and annihilated in stars every day. http://www.space.com/scienceastronomy/antimatter_sun_030929.html In particle physics, antimatter extends the concept of the antiparticle to matter, where by 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. Furthermore, mixing of matter and antimatter would lead to the annihilation of both in the same way that mixing of antiparticles and particles does, thus giving rise to high-energy photons (gamma rays) or other particle?antiparticle pairs. The particles resulting from matter-antimatter annihilation are endowed with energy equal to the difference between the rest mass of the products of the annihilation and the rest mass
