1h 29min - If ancient aliens visited Earth, what was their legacy, and did they leave behind clues that exist in plain sight?
1h 29min - If ancient aliens visited Earth, who were they, and where did they come from?
1h 28min - If ancient aliens visited Earth, what was their mission, and is there evidence that points to when they will return? Ancient Sumerian tablets describe an alien race, known as the Anunnaki, who came to Earth to mine for gold.
1h 29min - Reports of encounters with strange beings and sightings of mysterious objects.
1h 29min - There is evidence that suggests we experienced 20th century alien contact.
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