People should ask themselves why gold should be an exception to this general principle and whether this price-fixing exercise is a good way to determine the supply of dollars.

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The good thing about this exercise is that the little guys get a chance to compete.

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"I think this study really helps to show that when you look across a lot of different people, exercise is a good thing, " Flynn says, noting that past studies have included far fewer women and older people.

CNN: Moderate exercise safe, healthy for heart-failure patients