What if women had been among the first to head to the moon? A NASA physician thought that wasn't such a far fetched idea back in the 1960s. He developed the physical and psychological tests used to select NASA's first male astronauts, and ran those same test on women, who thought their performance punched their ticket to the moon. We'll hear about what happened from two of the women involved. For more information on this episode visit nationalgeographic.com/overheard
Read why some scientists think the future of spaceflight should be female.
Meet the people who got us to space and the pioneers pushing us farther.
Explore the never-used Soviet space shuttles rusting in a hangar in Kazakhstan.
See Nat Geo editors' favorite space photos.
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