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American Institute of Physics
Homepage for the American Institute of Physics. Very comprehensive resource that contains good physics information.
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American Institute Physics: Quark Stars
Collapsed stars, between white dwarfs and black holes, can be studied as quark-gluon masses, or quark-hyperon groups. Extreme pressures lead to extreme states.
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American Institute of Physics: Where Does the Neutron Get Its Spin?
Describes two experiments on neutron spin. This is how physicists work.