Collection: 2013 SN Top 25

  1. Life

    Year in Review: Bioengineers make headway on human body parts

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  2. Life

    Year in Review: Your body is mostly microbes

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  3. Science & Society

    Top 25 stories of 2013, from microbes to meteorites

    This year, careful readers may have noticed a steady accumulation of revelations about the bacterial communities that call the human body home.

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  4. Planetary Science

    Mars was habitable longer, more recently than thought

    Warmer, wetter conditions lasted until 3.5 billion years ago on the Red Planet.

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  5. Math

    Twin primes and prime bunches in mathematicians’ crosshairs

    For second time this year, a mathematician makes a major advance toward proving a long-standing conjecture.

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  6. Astronomy

    ISON appears to have broken up after brush with sun

    Comet ISON has disintegrated in the sun’s intense heat and gravity, according to a growing consensus among astronomers.

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  7. Neuroscience

    Bacteria may transfer mom’s stress to fetus

    Expecting mice under psychological pressure passed different mix of microbes to their pups, affecting the babies’ brains.

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  8. Planetary Science

    Meteor explosions like this year’s Russian fireball more common than thought

    Chelyabinsk-sized rocks may come to Earth every 30 years, on average.

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  9. Life

    Newborns’ weak immunity may allow helpful bacteria to gain a foothold

    Though infant immune systems raise risk of infection, they also allow good microbes into the body, study in mice shows.

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  10. Life

    Steroids boost muscles for the long haul

    Experiments in mice suggest that effects don’t end when doping does.

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  11. Genetics

    People’s genes welcome their microbes

    In mice and humans, genetic variants seem to control the bacterial mix on and in bodies.

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  12. Astronomy

    Oort cloud tosses astronomers a cometary curveball

    In late November, ISON will deliver debris from the dawn of the solar system to Earth’s doorstep.

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