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为老鼠& # 8211是沙鼠把黑色瘟疫

发布时间:2018-09-19 16:39 作者:admin 来源: 点击: 字号:

It’;s always the cute ones –; a team of Norwegian researchers found that the Black Plague, which arrived in Europe in the 14th century and wiped out up to 200 million people was brought by gerbils, not by rats。

Gerbils may be responsible for bringing the Black Plague to Europe。 Image via Pet Info Club。

The Black Plague is one of the most devastating epidemics humanity has encountered, originating in Central Asia and traveling along the Silk Road, reaching today’;s Turkey and Ukraine。 From there, it spread to the Mediterranean area and across the entire continent, wiping out 30-60% of the continent’;s population。 Until now, scientists believe the agents which carried the pathogen were rats –; but Prof Nils Christian Stenseth, from the University of Oslo claims othwerwise:

“;If we’;re right, we’;ll have to rewrite that part of history。”;

The thing is, in order for rats to thrive and carry the disease across the entire continent, you would need some specific climatic conditions。

“;For this, you would need warm summers, with not too much precipitation。 Dry but not too dry。 And we have looked at the broad spectrum of climatic indices, and there is no relationship between the appearance of plague and the weather。”;

The emergence of the disease in Europe。 Image via Wiki Commons。

In order to see if the climate was suitable for rats, he and his team analyzed 15 tree ring records, which carry with them the conditions in certain years。 Tree ring analysis can be used to determine certain aspects of past climatic –; including the amount of rain。 They then compared these tree rings with 7,711 historical plague outbreaks to see if the weather conditions were right。 As it turns out –; they weren’;t。

本文源自: 环亚娱乐

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