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The City of Petra flooded

The City of Petra flooded

Making a self inflating balloon in 100 BC “Ingredients: Copper (copper age from 3000BC) Vinegar Salt water Aluminum (pulverized feldspar) Tools: Slate above fire and a goats bladder. Nothing adds up We didn’t really know about aluminum before the 1800’s, still this substance seem to have been used all over ...

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