Are There Lost Alien Civilizations in Our Past?

(10:29)

Civilizations at the End of Time: Iron Stars

(43:57)

Civilizations at the End of Time: Dying Stars

(32:21)

11 Forgotten Civilizations Discovered in Recent Times

(26:53)

Civilizations at the End of Time: The Big Rip

(38:9)

Eric Cline - The Collapse of Cities and Civilizations at the End of the Late Bronze Age

(1:1:35)

Civilizations at the End of Time: Dying Earth

(29:33)

18. Egypt - Fall of the Pharaohs

(3:58:13)

Civilizations at the End of Time: Black Hole Farming

(36:6)

17. Carthage - Empire of the Phoenicians

(3:39:4)

Civilizations at the Beginning of Time

(30:7)

Do we know more about ancient civilizations at their centers?

(3:19)

3. The Mayans - Ruins Among the Trees

(1:8:38)