Decades: 1150s 1160s 1170s 1180s 1190s - 1200s - 1210s 1220s 1230s 1240s 1250s
Years: 1203 1204 1205 1206 1207 - 1208 - 1209 1210 1211 1212 1212
Births
Deaths
... by a little generator embedded in the gyroscope. The physics of this device looks confusing at first sight, but is surprisingly simple. It can easily be understood with ...