Add Yahoo as a preferred source to see more of our stories on Google. On May 15, 1963, NASA astronaut Gordon Cooper launched on the sixth and final crewed flight of ...
CC0 Usage Conditions ApplyClick for more information. Project Mercury was the United States' first human spaceflight program. Delmas D. "Del" Burchfield (1926-2016) was an engineer at McDonnell ...
Great Smoky Mountains National Park was one of four parks in the eastern U.S. where the Dragonfly Mercury Project got its start. Easier to catch and cheaper to test than fish, dragonfly larvae can be ...
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