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Avsnitt tjugotva - det om antimateria
Vad \xe4r antimateria och finns det bara i science-fiction eller p\xe5 riktigt? Hur gick det till n\xe4r Paul Dirac f\xf6rst bara r\xe5kade skriva en ekvation som fungerade med anti-elektroner men som sen visade sig finnas p\xe5 rikt