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581

Centuries: 5th century - 6th century - 7th century

Decades: 530s 540s 550s 560s 570s - 580s - 590s 600s 610s 620s 630s

Years: 576 577 578 579 580 581 582 583 584 585 586


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Ear

... middle ear is hollow. If the animal moves to a high-altitude environment, or dives into the water, there will be a pressure difference between the middle ear and ...