News

  1. Health & Medicine

    Repairing muscle from the cell up

    Skeletal muscle stem cells can fix weakling muscles in mice and could eventually lead to treatments for muscular dystrophy.

    By Tia Ghose
  2. Earth

    Recipe for an avalanche

    The start of an avalanche is more about the snow than the slope.

    By Ashley Yeager
  3. Earth

    Howdy, neighbor!

    About 800 million years ago, East Antarctica, now one of the coldest regions on Earth, abutted what is now Death Valley, Calif., one of the hottest.

    By Sid Perkins
  4. Chemistry

    It’s DNA Jim, but not as we know it

    Chemists synthesized a DNA-like molecule using unnatural versions of the “letters” that make up the genetic code.