technology have also noted it. • The earliest written record of a windmill is from Yorkshire, England, dated 1185. • Paper manufacture began in Italy around 1270. • The spinning wheel was brought to Europe (probably from India) in the 13th century The magnetic compass aided navigation, first reaching Europe sometime in the late 12th century. • Eyeglasses were invented in Italy in the late s. • The astrolabe returned to Europe via Islamic Spain. • Leonardo of Pisa introduces Hindu-Arabic numerals to Europe with his book Liber Abaci in 1202. • The West's oldest known depiction of a stern-mounted rudder can be found on church carvings dating to around 1180." -- Reference Wikipedia.org back to 216) 217 "... explosions that were tested and used in the past two years on Earth have the
