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Macho pheromones rile fellows
Pheromones that induce aggression in other male mice are found in the major urinary protein complex in the animals' urine.
By Nathan Seppa -
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MathTied Up in Knots
Physicists have shown that tumbled strings will form surprisingly complex knots, helping explain how knots spontaneously form in nature.
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EarthDead Serious
Little progress has been made this decade in reducing the size of the Gulf of Mexico's dead zone, a massive area of oxygen-depleted water caused by agricultural and urban runoff.