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  1. Health & Medicine

    A single-dose antidote may help prevent fentanyl overdoses

    Packing overdose medication into nanoparticles could help it better counteract dangerous synthetic opioids.

    By Maria Temming
  2. Animals

    Watch a desert kangaroo rat drop-kick a rattlesnake

    Desert kangaroo rats have a wide arsenal for dodging rattlesnake ambushes. But the most dramatic might be their powerful midair kick.

    By Mike Denison
  3. Anthropology

    The first known fossil of a Denisovan skull has been found in a Siberian cave

    A new fossil and evidence that the hominids interbred with humans as recently as 15,000 years ago only add to Denisovans’ mystery.

    By Bruce Bower
  4. Astronomy

    4 things we’ll learn from the first closeup image of a black hole

    Scientists are gearing up to release the first image of the black hole at the center of the galaxy.