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  1. Earth

    Tiny minerals may have shaped Earth’s first plate boundaries

    Simulations link weakened rock minerals to the origin of plate tectonics on Earth.

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  2. Science & Society

    Millions of working mamas

    It has been a long time since millions of American women working outside the home was big sociological news. Women are now 47 percent of the U.S. workforce.

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  3. Genetics

    Feedback

    Readers ask about Neandertal genes and electricity-generating spores and react to a fusion milestone.

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  4. Earth

    Science can save lives, but only if society lets it

    Society faces lots of problems that science can’t yet fix.