'Green curtains' block heat, save energy

A growing number of people are turning to nature to help them save electricity this summer, creating so-called green curtains of climbing plants.

Robot climbs walls (w/ Video)

Wielding two claws, a motor and a tail that swings like a grandfather clock's pendulum, a small robot named ROCR ("rocker") scrambles up a carpeted, 8-foot wall in just over 15 seconds - the first such robot designed to climb ...

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