Cosmic Climb: Space Elevators are closer than you think
The first challenge is finding something in space to attach the cable to. The solution is using satellites in geostationary ...
The New York Times17h
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Trump Weakens U.S. Cyberdefenses at a Moment of Rising Danger The firing of the head of the N.S.A. was only the latest move to erode fortifications against cyberattacks, especially those targeting ...