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Archaeologists Uncover 12,000-Year-Old 'Ghost Footprints' In U.S. Air Force Base

Archaeologists have discovered 12,000-year-old human footprints in a U.S. air base. The 88 human footprints were found at Utah Test and Training Range in Utah's West Desert. The findings have been nicknamed “ghost footprints” because they only become visible after it rains when they become darker in colour after being filled with moisture, before disappearing again once it’s dry. A team ...

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