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  1. Materials Science

    Live heart cells make this material shift color like a chameleon

    A new material made of heart cells from rats and hydrogel changes color as the living cells contract and relax.

    By Maria Temming
  2. Archaeology

    Footprints put people on Canada’s west coast 13,000 years ago

    Island tracks indicate early New World settlers traveled down the North American Pacific coast about 13,000 years ago.

    By Bruce Bower
  3. Neuroscience

    Brain waves of concertgoers sync up at shows

    During a live musical performance, audience members’ brain waves get in sync.

    By Rachel Ehrenberg
  4. Astronomy

    Dark matter is MIA in this strange galaxy

    A galaxy without dark matter bolsters the case that the invisible substance really exists.