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A Matter of Gravity was a feature published in Doctor Who Annual 1970. It referred to the likes of Galileo Galilei, Wally Schirra, Walt Cunningham, and Don Eisel.

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  • In 1589, Galilei conducted various experiments on gravity at the Leaning Tower of Pisa.
  • Wally Schirra was an astronaut who conducted experiments on gravity with his crew mates, Walt Cunningham and Don Eisel.
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