News

  1. Health & Medicine

    Mars trip would deliver big radiation dose

    Curiosity instrument confirms expectation of major exposures.

    By Cristy Gelling
  2. Paleontology

    Fossil muddies the origin of birds

    New specimen may be a feathered dinosaur — or the earliest avian yet discovered

    By Rachel Ehrenberg
  3. Climate

    Southwest’s monsoon season may heat up with the climate

    Warmer temperatures may bring stronger rainy seasons over the long term, study finds.

    By Erin Wayman
  4. Life

    Response to bacterial infection depends on time of day

    Mice that got Salmonella in the evening fared better than those given the microbe in the morning.

    By Meghan Rosen
  5. Plants

    Mosses frozen in time come back to life

    Buried under a glacier for hundreds of years, plants regrow in the lab.