<p>Some of what we know about the Great Pyramid that exclude it having been built by aliens or Atlanteans.</p>

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Skeptoid #779: How the Pyramids Were (and Were Not) Built - Part 2

The true science behind our most popular urban legends. Historical mysteries, paranormal claims, popular science myths, aliens and UFO reports, conspiracy theories, and worthless alternative medicine schemes... Skeptoid has you covered. From the sublime to the startling, no topic is sacred. Weekly since 2006.