Technology: Extending Man's Grasp

Merely by turning his head, the pilot of an experimental Bell helicopter can cause a highly sensitive TV camera mounted in the nose of his craft to swivel in the same direction. And since the camera can "see" in the dark, its TV images, reflected onto special eyeglasses, give the pilot invaluable, owl-like vision at night.

To maneuver an agile four-legged "quadruped" truck that is being developed by General Electric for travel over rough terrain, the driver controls the vehicle's front legs with hand-operated levers; the rear legs are moved by the driver's...

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