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Latest / Matrix Wisdom, A Hidden History Podcast

The Longyou Caves of China Were Machined With Highly Advanced Technology Thousands of Years Ago

Carved of a homogeneous medium-hard rock called siltstone, the Longyou caves are believed to date to the Qin Dynasty in 212 BCE. But many suspect they are much, much older. Since their discovery, the caves have perplexed experts in archaeology, architecture, engineering, and geology. Even now, over 30 years later, they have absolutely no idea why it was made, how it was made, and even who it was made by.

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