A puzzle for scientists was found in Shelbyville, Illinois, USA. The town was founded in 1827, which is very recent by historical standards. How the city ended up 4-5 meters in the ground is a mystery.

A puzzle for scientists was found in Shelbyville, Illinois, USA. The town was founded in 1827, which is very recent by historical standards. How the city ended up 4-5 meters in the ground is a mystery.

December 17, 2021

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