History Documentaries
Graham Hancock argues that there are many ancient monuments and structures that cannot be explained by the conventional theories of history, such as the Pyramids of Giza, the Sphinx, and the megalithic structures at places like Stonehenge and Tiwanaku. He suggests that these structures may have been built by an advanced civilization that was capable of feats of engineering that were not possible for the civilizations that we know of today.
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