When the U.S. was born, humanity was still seven years away from balloon-borne flight. Where might we be another 250 years from now, should the nation be fortunate enough to survive that long?

A U.S. pastor claims he was taken to a secret UFO disclosure gathering in Tennessee ...

Giraffes may not just be tall—they may also be able to tally. In an experiment with four zoo giraffes, University of ...

Researchers propose turning a future NASA moon base into a quarantine station that would screen space samples before they ever reach Earth.