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  1. Mice have a sharp nose for pheromones

    Mice can detect pheromones with great sensitivity and in a way that's distinct from that of the main olfactory system.

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  2. Astronomy

    Black holes and galaxies may grow up together

    Astronomers have new and, for the first time, quantitative evidence that bigger black holes reside at the centers of bigger galaxies.

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  3. Archaeology

    Neandertals’ diet put meat in their bones

    Chemical analyses of Neandertals' bones portray these ancient Europeans as skillful hunters and avid meat eaters, countering a theory that they mainly scavenged scraps of meat from abandoned carcasses.

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  4. Math

    Punctured Polyhedra

    A tetrahedron.