About 5,000 years ago, 30 goats changed hands between Sumerians. To record the transaction, a receipt was carved onto a clay tag. Imagine how surprised these people would be to learn their receipt is now held in a museum. https://t.co/Z7MFWDQyJU
— Discover Magazine (@DiscoverMag) July 23, 2020
Friday, August 14, 2020
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