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AnimalsMany fish run on empty
Many fish eat all the time, while some others spend their days going from brief feast to lengthy famine.
By Janet Raloff -
Health & MedicineProtein flags colon, prostate cancers
A compound first identified as a possible culprit in Huntington's disease may be an indicator of cancers of the prostate gland and colon.
By Nathan Seppa -
AnimalsSinging frog in China evokes whales, primates
A frog in China warbles and flutes with such versatility that its high-pitched calls sound like those of birds or whales.
By Susan Milius -
19114
In this article, you state, “The first Fermat number is 22+1, or 5,” and later, “the first four Fermat numbers are prime, but [among] the rest, up to and now including the 24th, none are prime.”