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MathSurprisingly Square
Mathematicians take a fresh look at expressing numbers as the sums of squares.
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Health & MedicineImmune attack on self halts nerve damage
T cells primed for autoimmune behavior may actually preserve nerves after a damaging blow.
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Catfish can track fish wakes in the dark
Infrared photography has revealed that catfish can stalk their prey by following wakes underwater.
By Susan Milius -
Health & MedicineEnzyme defends germ against stomach acid
The newly solved structure of a Helicobacter pylori acid-fighting enzyme has scientists divided about how the enzyme works.
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EarthGeologists take magnetic view through ice
A new map of the magnetic anomalies in Antarctica and the seafloor surrounding the continent is giving researchers a fresh tool to use in analyzing geologic features that lie hidden beneath thousands of feet of ice or storm-tossed seas.