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  1. Math

    Theorems for Sale

    In April, an eBay auction offered math enthusiasts the rare opportunity of linking their names with one of the most famous mathematicians of the 20th century.

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  2. Humans

    From the June 2, 1934, issue

    The first chimpanzee twins born in captivity, increased speed and safety for aircraft, and a new pH indicator.

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  3. Math

    Priming Upward

    A singular effort has turned up what is now the largest known prime number.

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  4. Astronomy

    Transit of Venus

    On June 8, Venus will pass across the face of the sun (as viewed from Earth).