Physicists Create Crystals That Are Nearly Alive: The researchers developed self-propelled particles that would turn on in response to blue light. When the light is on, the randomly swimming particles collide and cluster. A chemical reaction set off by the light causes the particles to crystalize. When the light turns off, the particles stop and split apart...
Palacci and Chaikin are now working on a particle that has a metabolism and can self-replicate, but lacks mobility.
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