Ancient Aliens

If ancient aliens visited Earth, what was their legacy, and did they leave behind clues that exist in plain sight.

If ancient aliens visited Earth, what was their mission, and is there evidence that points to when they will return?

Reports of encounters with strange beings and sightings of mysterious objects in the sky have occurred throughout history.

There is evidence that suggests we experienced 20th century alien contact. In 1942, the Battle of Los Angeles involved the US military.

What if life on Earth began in outer space? Millions of people accept the theory that intelligent life forms visited Earth thousands of years ago and were worshiped as gods by primitive man.