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Tidsresor
\xc4r det m\xf6jligt att resa i tiden? Och i s\xe5 fall vad h\xe4nder om man reser bak\xe5t i tiden?
Lyssna p\xe5 alla avsnitt i Sveriges Radio Play.
Intervjuperson \xe4r Ingemar Bengtsson, professor vid Fysikum i Stockholm, som har forskat p\xe5 bland annat tidsresor.