sputnik

Fellow Traveler

Fifty years ago this month, the U.S.S.R. launched Sputnik 1, the world's first Earth-orbiting artificial satellite. Shocked into action, the U.S. ramped up its space program—and its science education.

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Sexual forms are not necessarily either male or female.

In a Neolithic community in Turkey, bone loss in older men and women showed, surprisingly, no significant sex differences.