# Earth's Alien Origins *Marathon* | Ancient Aliens

Free with YouTube's ads, posted by HISTORY.

From early human species and mysterious archaeological discoveries to strange sea creatures, explore theories of extraterrestrial life on Earth in this Ancient Aliens marathon.

#AncientAliens

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- What it is: Marathon
- Series: [Ancient](https://invisiblenetwork.ai/library/rights-holders/series/223d17ed3344)
- Length: 2 h 6 min
- Rights holder: [A&E Television Networks, LLC](https://www.history.com/) (its site links the channel: https://www.history.com/)
- Channel: [HISTORY](https://www.youtube.com/channel/UC9MAhZQQd9egwWCxrwSIsJQ)
- Plays: Only in United States, as its rights holder set it on YouTube
- Who can watch here: Adult profiles and older (no rating is recorded on YouTube, so adults only)
- Made for kids: No, as YouTube designates it
- On YouTube: [Watch on YouTube](https://www.youtube.com/watch?v=ZgieGlgO5D8)

It plays in YouTube's embedded player on its page here, loaded only when Play is pressed; YouTube's Terms of Service (https://www.youtube.com/t/terms) and Google's Privacy Policy (https://policies.google.com/privacy) apply to it.