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  1. Earth

    Diamonds reveal sign of the deepest water known inside Earth

    A rare form of ice crystal in the gems could have formed only at the crushing pressures found in the mantle.

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  2. Tech

    On Twitter, the lure of fake news is stronger than the truth

    An analysis of more than 4.5 million tweets discussing false and true stories reveals that in the Twittersphere, fake news gets more views.

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  3. Astronomy

    50 years ago, pulsars burst onto the scene

    Thousands of pulsars have been discovered since the announcement of their detection 50 years ago.

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  4. Physics

    Some meteorites contain superconducting bits

    Scientists find materials that conduct electricity without resistance in two meteorites.