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  1. Physics

    This tabletop device turns the quantum definition of a kilogram into a real mass

    The mini Kibble balance will measure 10 grams to an accuracy of a few ten-thousandths of a percent.

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  2. Climate

    The Southern Ocean may be less of a carbon sink than we thought

    The Southern Ocean’s ability to suck up much of the carbon that humans pump into the atmosphere is in question.

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  3. Climate

    Thousands of birds perished in the Bering Sea. Arctic warming may be to blame

    A mass die-off of puffins and other seabirds in the Bering Sea is probably linked to climate change, scientists say.