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The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is an electro-magnetic thruster for spacecraft propulsion and is anticipated to be tested in 2015. Muslim engineers within the Islamic world made extensive use of hydropower, together with early makes use of of tidal power, wind energy, fossil fuels similar to petroleum, and huge manufacturing unit complexes (tiraz in Arabic). A variety of industrial mills had been employed within the Islamic world, including fulling mills, gristmills, hullers, sawmills, ship mills, stamp mills, metal mills, and tide mills. By the 11th century, every province throughout the Islamic world had these industrial mills in operation.

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Muslim engineers additionally employed water generators and gears in mills and water-raising machines, and pioneered using dams as a source of water energy, used to offer additional power to watermills and water-elevating machines. It was a change in agriculture from the eighth to the 13th century in the Islamic area of the Old World. The economic system established by Arab and other Muslim merchants throughout the Old World enabled the diffusion of many crops and farming techniques all through the Islamic world, as well as the adaptation of crops and …

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The oldest known constructed roadways are the stone-paved streets of the town-state of Ur, dating to circa 4000 BCE and timber roads main through the swamps of Glastonbury, England, dating to around the similar time interval. The first long-distance road, which got here into use around 3500 BCE, spanned 1,500 miles from the Persian Gulf to the Mediterranean Sea, but was not paved and was solely partially maintained.

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Native copper does not naturally happen in large amounts, but copper ores are fairly common and a few of them produce metal simply when burned in wooden or charcoal fires. Eventually, the working of metals led to the invention of alloys such as bronze and brass (about 4000 BCE). The first makes use of of iron alloys such as metal dates to around 1800 BCE. Other technological advances made through the Paleolithic period had been clothes and shelter; the adoption of both technologies can’t be dated precisely, but they had been a key to humanity’s progress. As the Paleolithic era progressed, dwellings grew to become extra sophisticated and extra elaborate; as early as 380 ka, people were setting up momentary wooden huts.

In round 2000 …

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