Found in the Ljubljana Marshes in Slovenia, this incredible artifact dates back over 5,100 years. The wheel itself is made of ash wood, paired with a 124-centimeter oak axle.

The artifact’s exceptional condition is attributed to the oxygen-poor, waterlogged environment of the Ljubljana Marshes peat bog, which prevented the wood from decaying over the millennia.
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Photo credit Matevž Paternoster / MGML. https://mgml.si/en/city-museum/exhibitions/211/the-wheel-5200-years/