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- invasion and migration
- rise in population
- wars are prevalent in this era.
Medieval or Middle Ages
he invented the printing press.
Johann Guttenburg
address the need for publishing books that would spread the information to many people in a faster rate.
Printing Press
device that can magnify things that are invisible to the eye.
Microscope
developed the first compound microscope, guided by the principles used in making eyeglasses invented in the earlier years.
Zacharias Janssen
an optical instrument that helps in the observation of remote objects.
Telescope
invented the telescope.
Galileo Galilee
for offensive and defensive materials.
War Weapons
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