• 'Super sand' purifies water

    'Super sand' purifies water
    Australian researchers say that ordinary sand, which is used to filter water in many parts of the world, can be converted into a kind of
  • Urban life is bad for the brain

    Urban life is bad for the brain
    Life in the city is linked to an increase in brain activity associated with mental illness. A new study finds that living in a city can increase activity in the brain region