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Superstrings was a very popular topic among physicists in the 1980ies. They had a renaissance in 1995 but then the researchers changed focus to other things. Now superstrings have gained new momentum in physics again.

Professor Niels Obers from the Niels Bohr Institute, Copenhagen University, explains what superstrings and string theory is. He also explains why superstrings are popular among researchers. Science Journalists Jens Degett is interviewing.

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