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Ancient engineers

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Human-built 5600-year-old submerged bridge found inside cave stuns scientists

Geologists discover an ancient bridge in a cave in Mallorca that shows that humans settled the island as early as 6,000 years ago.

https://interestingengineering.com/culture/5600-year-old-mallorca-bridge?utm_placement=newsletter
When the world wearies and society ceases to satisfy, there is always the garden - Minnie Aumônier
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