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  1. Animals

    Why midsize animals are the fastest

    New analysis delves into the mystery of why medium-sized animals are speedier than bigger ones.

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  2. Astronomy

    What will scientists learn from the Great American Eclipse?

    Between now and August 21, astronomy writer Lisa Grossman will explore the top questions scientists will tackle during the 2017 total solar eclipse.

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  3. Astronomy

    Why is this year’s solar eclipse such a big deal for scientists?

    Total eclipses offer scientists a way to see all the way down to the sun’s surface.

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  4. Climate

    Climate change is shifting when Europe’s rivers flood

    Data spanning 50 years shows that today, floods come days, weeks, even months earlier in some areas and later in others.