When a particle collides with its antiparticle, both masses are converted completely to energy in a process called annihilation, the most efficient and violent process that we know in the universe. The original particles disappear, and this means that energy appears as a spray of rapidly moving particles and electromagnetic radiation. This fact has long been adopted by science fiction writers in their description of futuristic weapons and power sources. (The starship Enterprise on Star Trek, for example, has matter and antimatter pods as its power source).
Although antimatter is fairly rare in the universe, it is routinely produces in particle accelerators. High-energy protons strike nuclear targets, and the energy of the particles is converted to equal number of other particles and antiparticles. Thus the evidence of antimatter is verified daily in laboratories.