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  1. Health & Medicine

    Head to Head: Brain implants are better for Parkinson’s patients

    Parkinson's patients who get electrodes surgically implanted in their brains regain some muscle control and have improved quality of life.

    By Nathan Seppa
  2. Paleontology

    Frozen rainforest

    Fossils trapped in amber provide evidence that the Amazonian rainforest dates back 10 to 15 million years.

    By Eric Jaffe
  3. Earth

    When a Shot Is Not: PCBs may impair vaccine-induced immunity

    Exposure to certain pollutants early in life may do lasting harm to the immune system by blocking its response to vaccinations.

    By Ben Harder

  4. Moss Express: Insects and mites tote mosses’ sperm

    A lab test has shown that mosses have their own version animal-courier system for sperm that's similar to pollination.