Amazing Vikings! Not only did they first discover North America and Greenland, but also the Azores!
The PNAS article title below refers to the Medieval Warm Period (ca 950-1250 AD). Exactly why was that island called Greenland? Global Warming is a hoax. Climate Change a religion.
Caveat: This study relies on unreliable climate models!
"... In 2015, a study found some evidence in the unlikeliest of places: mice. The study noted intriguing genetic similarities between mice in the Azores and in Northern Europe. But as tantalizing as this evidence was, it was insufficient to draw any clear conclusions. Now, the needed evidence may have finally been discovered. ...
But in addition to climate information, researchers also found signs of human disturbance: pollen from non-native crops that explorers would have brought along and spores from fungi that grow on livestock dung. This was not surprising — but what was surprising was that these traces extended all the way back to 700 years before the Portuguese settled on the Azores.
In one particular layer, that was dated to AD700-850, researchers found clear signs of human activity: an increase in charcoal particles, a dip in the pollen of native trees, and a compound (5-beta-stigmastanol) that is found in the feces of animals such as cows and sheep. This suggests that some of the island’s trees were being cut down and burned, presumably to make way for pastures. ..."From the abstract:
"... Here, we use a multiproxy approach to reconstruct the initial colonization and subsequent environmental impacts on the Azores Archipelago. Our reconstructions provide unambiguous evidence for widespread human disturbance of this archipelago starting between 700-60+50 and 850-60+60 Common Era (CE), ca. 700 y earlier than historical records suggest the onset of Portuguese settlement of the islands. Settlement proceeded in three phases, during which human pressure on the terrestrial and aquatic ecosystems grew steadily (i.e., through livestock introductions, logging, and fire), resulting in irreversible changes. Our climate models suggest that the initial colonization at the end of the early Middle Ages (500 to 900 CE) occurred in conjunction with anomalous northeasterly winds and warmer Northern Hemisphere temperatures. These climate conditions likely inhibited exploration from southern Europe and facilitated human settlers from the northeast Atlantic. These results are consistent with recent archaeological and genetic data suggesting that the Norse were most likely the earliest settlers on the islands."
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