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  1. Physics

    Falling through the Earth would be a drag

    Scientists study how friction affects a hypothetical jump through the center of the Earth.

    By Emily Conover
  2. Health & Medicine

    Vaccines could counter addictive opioids

    Scientists turn to vaccines to curb the growing opioid epidemic.

    By Susan Gaidos
  3. Paleontology

    Parasites wormed way into dino’s gut

    Tiny slimed tunnels in the guts of a 77-million-year-old duck-billed dinosaur fossil offer the first hard evidence that dinosaurs may have been infected by parasitic worms, paleontologists say.

    By Meghan Rosen
  4. Science & Society

    Special Report: Aging’s Future

    What is aging? How does it change the brain? How did different life histories evolve? This special report addresses those questions and more.