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Maritime transport
In the stone age primitive boats were developed to permit navigation of rivers and for fishing in rivers and off the coast. It has been argued that boats suitable for a significant sea crossing were necessary for people to reach Australia 40,000-45,000 years ago. With the development of civilization, bigger vessels were developed both for trade and war. In the Mediterranean, galleys were developed about 3,000 BC. Galleys were eventually rendered obsolete by ocean-going sailing ships, such as the man-of-war, in the late 15th century. In the industrial revolution, first steam ships and later diesel-powered ships were developed. Eventually submarines were developed mainly for military purposes.
Meanwhile specialized craft were developed for river and canal transport. Canals were developed in Mesopotamia circa 4000 BC. The Indus Valley Civilization in Pakistan and North India (from circa 2600 BC) had the first canal irrigation system in the world. The longest canal of ancient times was the Grand Canal of China. It is 1794 kilometers (1115 miles) long and was built to carry the Emperor Yang Guang between Beijing and Hangzhou. The project began in 605, although the oldest sections of the canal may have existed since about 486 BC.
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What did the Indus valley Civilization in Pakistan and North India have?
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