Hoyle was a scientist from old Earth. He and Wickramansingh postulated a theory that viruses came from outer space.

During the EEC exploration of Pern, Castor mentioned the Hoyle-Wickramansingh theory to explain a lifeless planet they had explored, but Ben Turnien didn't believe the theory.

When Thread began to fall on Pern during the First Pass, Mar Dook suggested the Hoyle-Wickramansingh theory as the source of Thread. Once Bart Lemos and Nabhi Nabol explored the debris trail of The Red Star and determined it to be the source of Thread, Ezra Keroon declared the Hoyle-Wickramansingh theory vindicated.


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