News

  1. Life

    H9N2 avian flu strain has pandemic potential

    Just one change in a strain of avian flu virus makes it transmissible by direct contact in ferrets, but the virus still lacks the ability to spread by airborne particles.

    By Tina Hesman Saey
  2. Plants

    Bittersweet fruits

    A new study provides strong evidence that fruits harm predators with the same chemicals that, for example, give chili peppers their spice.

    By Rachel Ehrenberg
  3. Health & Medicine

    Running interference on cholesterol

    Injected RNA molecule lowers LDL in rats and monkeys.

    By Patrick Barry
  4. Life

    Humans aided, constrained by fossil fuels

    Maintaining long-term population will require alternate energy sources.