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- Better chow yields more milk: A more nutritious form of corn for dairy cows boosts farm profits, teen investigator finds
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SHARK PROPELLERS
The denticles of the bonnethead shark (Sphyrna tiburo), shown here, are about 100 microns in diameter, the thickness of a piece of printer paper. The teethlike structures give sharks extra thrust in the water, a new study shows.
Credit: J. Oeffner and G.V. Lauder/Harvard Univ.
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