Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult. ...

Whether the proton decays or not is not known. To prove that it does not decay is very difficult. (Richard Feynman)

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Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.

Richard Feynman Quotes: Whether the proton decays or not is not known. To prove that it does not decay is very difficult.