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Mausoleum of Qin Shi Huang
Soil over China's first emperor's tomb holds up to 2204 ppb mercury, as an old historian said it would.
It was constructed over 38 years from 246 to 208 BC, and is situated underneath a…
Should it be, and what might it hold?
Photo: Aaron Zhu, CC BY-SA 3.0, Wikimedia Commons