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  1. Boyish Brains: Plastic chemical alters behavior of female mice

    Exposure to the main ingredient of polycarbonate plastics can alter brain formation in female mouse fetuses and make the lab animals, later in life, display a typically male behavior pattern.

    By Ben Harder
  2. Animals

    No Early Birds: Migrators can’t catch advancing caterpillars

    Pied flycatcher numbers are dwindling in places where climate change has knocked the birds' migration out of sync with the food-supply peak on their breeding grounds.

    By Susan Milius
  3. Anthropology

    Evolutionary Back Story: Thoroughly modern spine supported human ancestor

    Bones from a spinal column discovered at a nearly 1.8-million-year-old site support the controversial possibility that ancient human ancestors spoke to one another.