Einstein's gravitational theory, which is said to be the greatest single achievement of theoretical physics, resulted in beautiful relations connecting gravitational phenomena with the geometry of space; this was an exciting idea.

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• Richard P. Feynman:

  All the evidence, experimental and even a little theoretical, seems to indicate that it is the ener

• Richard P. Feynman:

  The first amazing fact about gravitation is that the ratio of inertial mass to gravitational mass i

• Richard P. Feynman:

  The universe is very large, and its boundaries are not known very well, but it is still possible to

• Richard P. Feynman:

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• Richard P. Feynman:

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• Richard P. Feynman:

  The philosophical question before us is, when we make an observation of our track in the past, does

• Richard P. Feynman:

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• Richard P. Feynman:

  Each piece, or part, of the whole of nature is always merely an approximation to the complete truth

• Richard P. Feynman:

  The correct statement of the laws of physics involves some very unfamiliar ideas which require adva

• Richard P. Feynman:

  Atoms are very special: they like certain particular partners, certain particular directions, and s