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  1. Tech

    Robot swarm takes many shapes

    One Kilobot is not very smart. But 1,000 can follow simple instructions to assemble into multiple shapes without human intervention.

    By Andrew Grant
  2. Life

    Gut bacteria may prevent food allergies

    In mice, gut bacteria blocked food from seeping out of the intestines and triggering an immune reaction in the bloodstream.

    By Meghan Rosen
  3. Chemistry

    Liquid salts break through armored bacteria on skin

    Compounds called ionic liquids can penetrate bacterial biofilms on skin to deliver antibiotics to potentially life-threatening infections.

    By Sam Lemonick
  4. Animals

    Antarctic midge sports tiniest insect genome

    Antarctic midge‘s genetic minimalism achieved by skipping a lot of repetitive stretches.