1781: Great Britain - Frederick William Herschel discovered the planet Uranus by its movement, although at the time he supposed it to be a comet
1781: Great Britain - Matthew Boulton and James Watt produce an improved steam engine with rotary motion achieving significant impact - it means that manufacturers are no longer restricted to site with natural power (i.e., water, wood for charcoal)
17 Oct 1781: USA - The Americans obtain a great victory of British troops at the Siege of Yorktown
