科学与环境

Anglo-Saxon kingdom chose copper coins despite abundant silver

来源: Phys.org - latest science and technology news stories · 发布于

Anglo-Saxon kingdom chose copper coins despite abundant silver
来源: Phys.org - latest science and technology news stories

Analysis of silver and gold from the Anglo-Saxon kingdom of Northumbria finds that, contrary to popular belief, it did not suffer from a shortage of precious metals, questioning why the kingdom used copper-alloy coins rather than silver like its contemporaries.

Analysis of silver and gold from the Anglo-Saxon kingdom of Northumbria finds that, contrary to popular belief, it did not suffer from a shortage of precious metals, questioning why the kingdom used copper-alloy coins rather than silver like its contemporaries.

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Gatineau Park foliage reveals local Cold War nuclear testing legacy
科学与环境

Gatineau Park foliage reveals local Cold War nuclear testing legacy

For more than six decades, local scientists have collected sugar maple leaves from Gatineau Park to measure their radiocarbon levels, creating the longest continuous record of its kind. Now, a study of those leaves led by the André E. Lalonde National Facility for Accelerator Mas

Phys.org - latest science and technology news stories ·