Sir Isaac Newton

“We have normality, I repeat we have normality.”
This article covers a subject that is part of the real world, and thus should not be taken as a part of the Hitchhiker's universe.

Sir Isaac Newton was mentioned in Fit the Sixth, the last episode of the Primary Phase of the radio series. The Guide said, in its entry on Haggunenons, that "the Haggunenons would have done for Charles Darwin what a squadron of Arcturan stunt-apples would have done for Sir Isaac Newton."