One of the most interesting and highly debated artefacts of the Baghdad Museum in Iraq is a clay pot. It is 5-6 inches high and encapsulates a copper cylinder. Suspended in the center of this cylinder—but not touching it—is an iron rod. Both the copper cylinder and the iron rod are held in place with an asphalt plug. The rod shows evidence of corrosion, probably due to the use of an acidic liquid like vinegar or wine. These artefacts (more than one was found) were discovered during the 1936 excavations of the old village Khujut Rabu, near Baghdad. The village is considered to be about 2000 years old, and was built during the Parthian period (250BCE to 224 CE). Although
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