Antimatter is a type of matter that is made up of antiparticles, which have the same mass as regular particles but opposite charges. For example, the antiparticle of an electron, called a positron, has a positive charge instead of a negative one. When antimatter comes into contact with regular matter, they annihilate each other, releasing a large amount of energy. Scientists study antimatter to understand fundamental physics and the universe's origins. It is produced in small amounts in particle accelerators and can also be found in certain types of radioactive decay. Although antimatter has potential applications in medicine and energy, it is currently difficult and expensive to produce.