Collection: 2013 SN Top 25

  1. Life

    Year in Review: Bioengineers make headway on human body parts

  2. Life

    Year in Review: Your body is mostly microbes

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  10. Life

    Steroids boost muscles for the long haul

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

  11. Genetics

    People’s genes welcome their microbes

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

  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.