Technolgy
The oldest known constructed roadways are the stone-paved streets of the city-state of Ur, courting to circa 4000 BCE and timber roads leading through the swamps of Glastonbury, England, relationship to across the identical time interval. The first long-distance road, which came into use round 3500 BCE, spanned 1,500 miles from the Persian Gulf to the Mediterranean Sea, however was not paved and was solely partially maintained. In round 2000 BCE, the Minoans on the Greek island of Crete constructed a fifty-kilometer (thirty-mile) street leading from the palace of Gortyn on the south facet of the island, through the mountains, to the palace of Knossos on the north side of the island. According to archaeologists, the wheel was invented around 4000 BCE in all probability independently and practically concurrently in Mesopotamia (in present-day Iraq), the Northern Caucasus and Central Europe. Estimates on when this will have occurred vary from 5500 to 3000 BCE with most specialists putt...