<p>This buried rock wall found throughout Rockwall County has people wondering about its origin.</p>

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Skeptoid #959: Finding the Black Olmec

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.