261881 external_news 1387323691 1475893614 Scientists at the Georgia Institute of Technology, including Zhongyang Liu and David Hu, are interested in the ways that a mass of fire ants can act like a fluid or a solid, depending on the situation. It’s the first time this duality had been observed in a group of living things. The research could have practical implications, Dr. Hu said, for self-assembling robots, which build themselves out of smaller bits and for self-healing materials.

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