The conceiver of one of mankind's coolest ideas for boundless clean energy died last week. He was 90 and first published his ideas in 1968, a year before NASA put a man on the moon. In its December 1972 issue, Popular Science described engineer Peter Glaser's proposal:
Answer:
north america is at the top
Explanation:
Only 19th century sociologists tested their theories with systematic research.
Answer:
Italy had three advantages that made it the birthplace of the Renaissance: thriving cities, a wealthy merchant class, and the classical heritage of Greece and Rome. Overseas trade, spurred by the Crusades, had led to the growth of large city-states in northern Italy.
Explanation:
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