علوم
Lead isotopes trace Malawi's mysterious copper ingot hoard to Congo's Kipushi mine
المصدر: Phys.org · نُشر في

In 1967, a Malawian farmer stumbled upon a hidden hoard of eight copper ingots buried beneath a tree. Now, more than half a century later, scientists have traced the metal to its source: a copper…
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- #copper
- #hoard
- #mysterious
- #scientists
- #isotopes
- #malawian
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