portals

Discussed across 4 episodes of Ancient Aliens.

Episodes

S13E4 Earth's Black Holes 2018-05-18
S14E11 The Trans-Dimensionals 2019-08-16
S15E10 The Mystery of Skinwalker Ranch 2020-03-28
S20E12 Unlocking the Stargates 2024-07-05

Often discussed alongside