COSMONAUT Valeri Polyakov turns 75 today, none the worse for wear for all of his recording-breaking time in space. Walking on slightly unsteady legs, because of a loss of muscle density after spending ...
Robert Zimmerman, who covers aerospace for UPI Science News, also is an independent space historian. His most recent book, "Leaving Earth: Space Stations, Rival Superpowers, and the Quest for ...
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