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Freeman Dyson, the first scientist to explore the concept
Freeman Dyson, the first scientist to explore the concept
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The Great Wall of China, at 6,352 km or 3,947 mi long, is a megastructure. This picture was taken near Beijing in February 2005.
The Great Wall of China, at 6,352 km or 3,947 mi long, is a megastructure. This picture was taken near Beijing in February 2005.
One concept for the space elevator has it tethered to a mobile seagoing platform.
One concept for the space elevator has it tethered to a mobile seagoing platform.