Prehistoric man may refer to: <span>Human evolution </span><span>the Homo (genus)</span><span>archaic Homo sapiens</span><span>any perceivedly primitive culture</span>
Answer: In 1492, a Spanish-based transatlantic maritime expedition led by Italian explorer Christopher Columbus encountered the Americas, continents which were virtually unknown to and outside of the Old World political and economic system. The four voyages of Columbus led to the widespread knowledge that a continent existed west of Europe and east of Asia. This breakthrough in geographical knowledge inaugurated a period of exploration, conquest, colonization, biological exchange, and trans-Atlantic trade, the effects and consequences of which persist to the present, and are sometimes cited as the beginning of the modern era
Explanation:
C. Alexander the Great
Alexander the Great established one of the largest Empires in history. First, he began by fighting and defeated the Persian Empire. He actually conquered Egypt and founded Alexandria in doing so. He then marched towards Mesopotamia and conquered Babylon.
The City Wall of Nanjing<span> (</span>Chinese<span>: </span>南京城墙<span>; </span>pinyin<span>: </span>Nánjīng chéngqiáng<span>) was designed by </span>Emperor Zhu Yuanzhang<span> (r. 1328–1398) after he founded the </span>Ming Dynasty<span> (1368–1644) and established </span>Nanjing<span> as the capital 600 years ago. To consolidate his sovereignty and keep out invaders, he adopted the suggestions of advisor Zhu Sheng to build a higher </span>city wall, to collect grains and to postpone the coronation. Then, he started to build the city wall. It took 21 years to complete, and used 200,000 laborers to move 7 million cubic metres of earth. The City Wall of Nanjing was among the largest city walls ever constructed in China.[1][2]<span> The enclosed </span>Nanjing City<span> is about 55 square kilometers.</span>
