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One-electron universe
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<p>The one-electron universe postulate, proposed by theoretical physicist <a href="/facts/John_Archibald_Wheeler/I1A5t0Fd">John Wheeler</a> in a telephone call to <a href="/facts/Richard_Feynman/32vGFrtB">Richard Feynman</a> in the spring of 1940, is the hypothesis that all <a href="/facts/Electron/L0KBo5cW">electrons</a> and <a href="/facts/Positron/HgV4zBzA">positrons</a> are actually manifestations of a single entity moving backwards and forwards in time. According to Feynman: </p> <p>I received a telephone call one day at the graduate college at Princeton from Professor Wheeler, in which he said, "Feynman, I know why all electrons have the same charge and the same mass" "Why?" "Because, they are all the same electron!"</p> <p>A similar "zigzag world line description of pair annihilation" was independently devised by <a href="/facts/Ernst_Stueckelberg/T6vw38Sq">E. C. G. Stueckelberg</a> at the same time. </p>