Human flight was still 7 years away in 1776. Now, we're headed back to the moon

Humanity has likely dreamed of flight since the very beginning, marveling at birds soaring overhead and trying to puzzle out their seemingly magical secret. We made some halting steps over the centuries — getting kites aloft in ancient China, for example, and drawing up ambitious but unrealized flying machines during the Renaissance — but our boots were still firmly rooted on the ground when the United States of America was born on July 4, 1776.Things changed just a few years later,