The universe is very large, and its boundaries are not known very well, but it is still possible to define some kind of a radius to be associated with it.

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• Richard P. Feynman:

  We get the exciting result that the total energy of the universe is zero. Why this should be so is

• Richard P. Feynman:

  The extreme weakness of quantum gravitational effects now poses some philosophical problems; maybe

• Richard P. Feynman:

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

• Richard P. Feynman:

  Often one postulates that a priori, all states are equally probable. This is not true in the world

• 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

• Richard P. Feynman:

  There is nothing that living things do that cannot be understood from the point of view that they a

• Richard P. Feynman:

  We do not know what the rules of the game are; all we are allowed to do is to watch the playing. Of

• Richard P. Feynman:

  From the point of view of basic physics, the most interesting phenomena are, of course, in the new