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  1. Planetary Science

    Ringing in a new moon

    The Cassini spacecraft has spotted a new moon of Saturn, only the second known to lie within the planet's main rings.

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  2. Why making fat is good for you

    Making new fat from food intake, as opposed to using stored fat, regulates genes important for blood sugar, fatty acid, and cholesterol concentrations.

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  3. Health & Medicine

    Us against Them

    New antibiotics may be valuable weapons in the fight against tougher bacteria.

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  4. 19553

    This article should also point out that only a very thick atmosphere could have allowed the surface temperature to be high while the radiation output from the sun was only 70 percent that at the present.