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Iron Age slag shows earth used to have stronger magnetic field

An analysis of Iron Age slag, leftover from ancient copper smelting, shows that Earth's magnetic field was strong and more variable 3,000-years-ago than previously suspected. The Earth’s magnetic field comes from the movement of molten iron in the core. The field’s strength and structure are constantly changing. But paleomagnetists (scientists

Roman artifacts rewrite history of South West England

Roman coins, pottery and slag found in Cornwall are challenging the notion that the Romans did not settle the South West of England. Mr Smith said: "For Roman Britain it's an important and quite crucial discovery because it tells us a lot about Roman occupation in the South West that

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