Key events in High middle ages are church schism, the emergence of chivalry, crusades, development of cities and commerce, improvement of agricultural technology and rapid population growth, development of castles and universities.
Explanation:
Around year 1000, contrary to the expectations of the Day of Judgment, Europe is experiencing an economic upswing and population growth
cultivation of the land was perfected
more food - higher population growth
The need for higher education institutions at which to study theology, legal science and medicine, the first university was founded in 1088 Bologna
The universities of Paris and Oxford were established in the 12th century, and by the 14th century all the major European cities had universities
Class: History
Level: Middle school
Keywords: Universities, Population growth, crusades, chivalry
I believe prehistory was the time before the humans (such as prehistoric times where there were dinosaurs) and historic times mean when humans were walking the earth
the Europeans all had immunity to diseases such as smallpox, but since it was a foreign disease to the Aztecs, they did not have immunity against the diseases. That's how vaccines work: they give you immunity by introducing a weakened version of a virus so your body knows how to respond to it.