Centuries: 5th century - 6th century - 7th century
Decades: 500s 510s 520s 530s 540s - 550s - 560s 570s 580s 590s 600s
Years: 550 551 552 553 554 555 556 557 558 559 560
Events
Births
Deaths
... to make the gyro fall over.) The axis of the gyroscope in the Dynabee is fixed to the spinning mass and it rests in a little groove inside the wrist exerciser ...