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  1. Animals

    Singing 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.

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  2. 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.” Almost all number theorists consider the first Fermat prime to be F0 = 220 + 1 = 3, so […]

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  3. Math

    Solving an Ancient African Game

    The game of awari has entranced players for thousands of years.