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A comment on Could an Industrial Civilization Have Predated Humans on Earth?. Parent comment

Re:Could an Industrial Civilization Have Predated Humans on ... by siriaan on Saturday July 15, 2023 @12:42AM (#36733607)
The bedrock around Göbekli Tepe is apparently limestone, so saith Wikipedia, so no, metal is not required to carve it.
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Re:Could an Industrial Civilization Have Predated Humans on ... by dr_dshiv on Saturday July 15, 2023 @03:29AM (#36734453)
Stonehenge is much harder stone—and carved from “hammerstones.” Crazy the effort it took.
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