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United States physicist who discovered antimatter in the form of an antielectron that is called the positron (1905-1991)

United States physicist who discovered antimatter in the form of an antielectron that is called the positron (1905-1991)

United States physicist who discovered antimatter in the form of an antielectron that is called the positron (1905-1991)

United States physicist who discovered antimatter in the form of an antielectron that is called the positron (1905-1991)

United States physicist who discovered antimatter in the form of an antielectron that is called the positron (1905-1991)