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  1. Feb 28, 2015 #1
    As someone who cycles and has a love of what pushes where and when and why I am pleased to join. Have been reading about the speed of gravity which raises other questions. How much younger am I because I cycle? This will be a very small amount.
  2. jcsd
  3. Feb 28, 2015 #2
    Welcome to PF!
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