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predicted from quantum mechanics and relativity by a very clever theoretical physicist called Paul Dirac who was probably the second brightest you know
physicist of the 20th century apart from Einstein but isn't as well anywhere near as well known so he predicted the existence of the anti electron from
basically a combination of the theories of quantum mechanics and relativity and it was discovered about a year after he made their prediction what happens when
Listen to native speakers pronounce “anti electron” in real conversational contexts with synchronized timestamps and subtitles.