Humans have been spotting — and remarking on — mysterious forms in the sky since the beginning of recorded history, but author Garrett Graff traces the "modern age of UFOs" to a flurry of sightings ...

A new report details that the number of sightings of Unidentified Anomalous Phenomena is increasing as enthusiasts are searching for a chance to connect with the outrageous mysteries of the universe.

INDIANAPOLIS (STACKER) — When pilot Kenneth Arnold took off from Chehalis, Washington, in his single-engine airplane one afternoon in June 1947, he was looking for a lost military aircraft that had ...