In the Nov. 30 SN: A diabetes drug has cancer potential, supernovas raise questions about dark energy, steroids’ effects may last years and why some scientists think molecular shepherds in the brain may turn wolf.

November 30, 2013

  • Mystery Solved

    Ripple effect

    If you want ripples in your icicles, just add salt. This recipe comes from physicists reporting in the October New Journal of Physics.
  • Reviews & Previews

    The Accidental Species

    This is not a typical book about human evolution. There’s no chronology of fossil discoveries, no detailed description of hominid species or even an illustration of human family trees. In fact, the book is largely about what we don’t know about human evolution — and what we’ve gotten wrong.

  • Reviews & Previews


    The challenge was to build a safe, mass-producible vehicle that can carry two people 100 miles using no more than the energy in a gallon of gas. In 2007, the X Prize Foundation offered $10 million to be shared by teams that could pull it off, and in 2010, three groups claimed the prize.

  • The List

    World’s worst polluted

    A new report by Green Cross Switzerland and the Blacksmith Institute lists places posing the greatest risk to human health.