In a Philadelphia office, R. Buckminster Fuller holds up a tensegrity sphere one of his inventions thats inspired a space project April 18, 1979. Dr. Enrest Okress of the Franklin Center envisions the structure, made of rods and cables, as the basis for a Spherical Tensegrity Atmospheric Research Station Stars. A giant tensegrity sphere could be light and strong enough to support a floating space station a mile in diameter. (AP Photo/Bill Ingraham
Innovation Lab 