Feature

  1. A Spitting Image of Health

    How saliva can help doctors diagnose disease.

    By Susan Gaidos

  2. Darwin’s Tongues

    Languages, like genes, can tell evolutionary tales.

    By Bruce Bower

  3. Space Eats

    Astronaut journey to Mars requires new age nibbles.

    By Alexandra Witze

  4. Lopped Off

    Removal of top predators trickles through the food web.

    By Nadia Drake

  5. Beware the Long Tail

    Economic models of risk don’t add up, cadre of researchers caution.

    By Rachel Ehrenberg

  6. Like a Bolt from Above

    Lightning scientists begin to solve electric mysteries.

    By Alexandra Witze
  7. Health & Medicine

    Reviving A Tired Heart

    With a bit of encouragement, the life-giving muscle may renew itself.

    By Laura Beil
  8. Physics

    The Ultimate Clock

    Keeping precise time on the universe’s scale.

    By Charles Petit
  9. Astronomy

    A Shadowed Past

    Understanding of moon’s earliest days gets even murkier.

    By Nadia Drake
  10. Life

    Singled Out

    How to study cells, one by one.

    By Susan Gaidos
  11. Planetary Science

    Fertile Frontiers

    Alien-life hunters focus on moons in outer solar system

    By Nadia Drake
  12. Health & Medicine

    The Probabilistic Mind

    Human brains evolved to deal with doubt.

    By Laura Sanders