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Positron is a fundamental particle and the antiparticle of the electron. It has the same mass as the electron but carries a positive electric charge. Because of this property it is also called a "positive electron". The existence of the positron marked a pivotal moment in our understanding of the building blocks of matter and the fundamental symmetries of the universe. The positron was first discovered in 1932 by American physicist Carl David Anderson during experiments with cosmic rays. Anderso