News

  1. Life

    Fossil evidence for a Goldilocks tyrannosaur

    A newly described species of tyrannosaur helps fill in details about the fearsome meat-eating dinosaurs.

    By Sid Perkins
  2. Agriculture

    News from Experimental Biology

    Senior editor Janet Raloff blogs from the 2009 meeting gathering dozens of societies together in New Orleans

    By Janet Raloff
  3. Health & Medicine

    Childhood leukemia worsened by genetic mutations

    Mutations in JAK genes make childhood leukemia more dangerous and may offer a target for drug manufacturers.

    By Nathan Seppa
  4. Life

    New neurons don’t heal

    New neurons produced in the brain after a stroke don’t grow into all the cell types needed to heal the wound.