Patent awarded for a spherical robot soldier.

A small armored sphere rolls swiftly across a craggy landscape. It comes to a sudden stop, perching on three telescoping legs and sprouting a long neck with an eye that can swivel around 360 degrees. The enemy opens fire, but bullets merely ricochet off the sphere’s exoskeleton as from yet another opening there emerges a gun, which– sensing heat and motion — takes aim and fires.

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