<p>A popular conspiracy theory claims that lots of people disappear under unexplainable circumstances in America's national parks.</p>

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Skeptoid #795: What Made the Shroud of Turin Immortal

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.