Famous personalities - Chess players of Switzerland. Crosswordist's Handbook

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Famous people / Athletes / Swiss Chess Players

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Ancient people poisoned with heavy metals 28.02.2020

It is believed that toxic heavy metals such as mercury, lead or cadmium appear in the environment due to human activities: due to technological disturbances in enterprises, due to industrial discharges, chemical waste, etc. But in fact heavy metals in food and water could appear for a long time. For example, a few years ago, experts found quite a lot of mercury in the remains of fish caught about 6500 years ago in North America.

Researchers from the University of Tromso - the Arctic University of Norway and Stockholm University studied the chemical composition of the bones of fish and harp seals found by archaeologists at eight ancient sites on the Varanger Peninsula; the age of the sites varied from 6300 to 3800 years. (The fact that the inhabitants of these sites also ate seals was evidenced by the characteristic marks on the bones of animals - they were needed not only for the skins, but also for the meat.) Compared to the maximum allowable level set for toxic metals by the European Safety Agency food, fish bones contained 20 times more cadmium and four times more lead. The situation was exactly the same with lead in the bones of seals, and cadmium in them was 15 times more. There was also a lot of mercury in fish and seals.

In those distant times, mercury and other things in sea water could appear after the ocean level rose and the water covered the earth with ores containing heavy metals. However, it is not yet clear whether the ancient hunter-gatherers actually poisoned themselves with their heavy metal food. Most likely, they ate not only marine animals, but also some deer with hares, and plants, and toxic impurities from fish and seals did not necessarily accumulate quickly enough to harm health.

On the other hand, even if the metals accumulated quickly, people themselves could die even faster from some other causes (from hunger or from skirmishes with each other). One way or another, the authors of the work are going to study directly the remains of people from the Varanger Peninsula in order to understand whether they suffered from any diseases associated with heavy metals.

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