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  1. Humans

    Fossils reveal a strong-armed, dead-end hominid

    Olduvai Gorge finds suggest extinct hominid both walked and hung out in trees.

    By Bruce Bower
  2. Neuroscience

    Brain chip enables injured rats to control movements

    Prosthesis bypasses damaged area to connect distant neurons.

    By Laura Sanders
  3. Planetary Science

    Mars was habitable longer, more recently than thought

    Warmer, wetter conditions lasted until 3.5 billion years ago on the Red Planet.

    By Andrew Grant
  4. Animals

    A corsage that bites

    The orchid mantis uses a flowery subterfuge to lure prey.

    By Susan Milius
  5. Astronomy

    Saturn’s six-sided cloud pattern gets a close look

    New images show particles in the planet’s hexagonally shaped jet stream.