Feynman said 

If a hadron moves with a velocity close to that of light,
Feynman observed that it is collection of an infinite number of partons
which behave like independent massless particles with a widespread
momentum distribution. Feynman's partons have properties quite different
from those of the quarks.


In
1970, Feynman stated that
(1) hadronic spectra on Regge trajectories are manifestations
the degeneracies of threedimensional harmonic oscillators, (2) and we should
try oscillator wave functions, instead of Feynman diagrams, for bound states
in the relativistic world.


When we solve a quantummechanical problem, what we really do is
divide the universe into two parts  the system in which we are interested
and the rest of the universe. We then usually act as if the system in
which we are interested comprised the entire universe.
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