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Termites inspire robot builders

US scientists have developed small robots that behave much like termites.

The insects build impressive, metres-high structures even though they can follow only simple rules and have no knowledge of an overall plan.

The Harvard Wyss Institute's robot brick-layers do something similar, sensing just the immediate area and taking limited cues from each other.

Lead researcher Dr Justin Werfel explains how termites came to inspire his team's robots.

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