Decades: 1350s 1360s 1370s 1380s 1390s - 1400s - 1410s 1420s 1430s 1440s 1450s
Years: 1396 1397 1398 1399 1400 - 1401 - 1402 1403 1404 1405 1406
Births
Deaths
... gyro tops will not simply fall over, but start precessing around. (The precessing motion is perpendicular to the torque trying to make the gyro fall over.) The ...