Thought HN folks would enjoy this engineering marvel, a helix staircase built in the 1800s with no nails or central support column, under mysterious circumstances.
* An academic paper on the underlying physics: "Origin of Unusually High Rigidity in Selected Helical Coil Structures" (2018).
https://arxiv.org/pdf/1706.03288.pdf
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[ 3.8 ms ] story [ 13.2 ms ] thread* A short piece on the engineering: https://nanoten.com/travel/Santa-Fe/
* An academic paper on the underlying physics: "Origin of Unusually High Rigidity in Selected Helical Coil Structures" (2018). https://arxiv.org/pdf/1706.03288.pdf
* An examination of the "less miraculous" pieces of the legend: https://cdn.centerforinquiry.org/wp-content/uploads/sites/29...