Date: 1999 - 2000
What is rotation that it is found everywhere at all size
scales in the universe? It exists in spin in fundamental particles, as
rotation of planets about suns, of suns in galaxies, of galaxies in clusters, etc.
The person who asked me this question said they
had tried to deal with things like conservation of angular momentum, but
that doesn't really say why rotation itself is
such a common thing at all scales of physical reality. Can you help?
If you want to live in a three-dimensional space, there are some things
you're just going to have to put up with.
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Update: June 2012