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The High Middle Ages was a period of tremendous expansion of population. The estimated population of Europe grew from 35 to 80 million between 1000 and 1347, although the exact causes remain unclear: improved agricultural techniques, the decline of slaveholding, a more clement climate and the lack of invasion have all been suggested. As much as 90 per cent of the European population remained rural peasants. Many were no longer settled in isolated farms but had gathered into small communities, usually known as manors or villages. These peasants were often subject to noble overlords and owed them rents and other services, in a system known as manorialism. There remained a few free peasants throughout this period and beyond, with more of them in the regions of Southern Europe than in the north. The practice of assarting, or bringing new lands into production by offering incentives to the peasants who settled them, also contributed to the expansion of population.

During the High Middle Ages, what percentage of the European population consisted of rural peasants?
Answer: 90
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Bird migration routes have been studied by a variety of techniques including the oldest, marking. Swans have been marked with a nick on the beak since about 1560 in England. Scientific ringing was pioneered by Hans Christian Cornelius Mortensen in 1899. Other techniques include radar and satellite tracking.

How have swans been marked?
Answer: a nick on the beak
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The Reformation in Europe officially began in 1517 with Martin Luther (14831546) and his 95 Theses. The Reformation greatly changed the Baltic region. Its ideas came quickly to the Livonian Confederation and by the 1520s were widespread. Language, education, religion and politics were transformed. Church services were now conducted in the vernacular instead of in Latin, previously used. During the Livonian War in 1561, northern Estonia submitted to Swedish control. In the 1560s two voivodeships of present-day southern Estonia, Dorpat Voivodeship (Tartu region) and Parnawa Voivodeship (Parnu region), became the autonomous Duchy of Livonia within the Polish-Lithuanian Commonwealth, under joint control of the Polish Crown and the Grand Duchy. In 1629, mainland Estonia came entirely under Swedish rule. Estonia was administratively divided between the provinces of Estonia in the north and Livonia in southern Estonia and northern Latvia. This division persisted until the early twentieth century.

What was the year of Martin Luther's death?
Answer:
1546