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Health & MedicineTungsten-alloy shrapnel might cause cancer
Wounds caused by shrapnel comprising tungsten alloyed with nickel and cobalt cause cancer in rats, raising questions about the wisdom of using tungsten in munitions.
By Nathan Seppa -
AnimalsPicky-eater termites choose good vibes
Good vibrations may have a lot to do with which pieces of wood a termite attacks.
By Susan Milius -
MathNew largest prime discovered
Computers have discovered a new largest prime number with a whopping 7,816,230 digits.
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AstronomyPuzzling radio blasts
Astronomers are stumped by powerful radio waves emanating from the center of our galaxy.
By Ron Cowen -