Answer:
Two people are born at the same moment, but they don't have the same birthdays. How could this be?
I tremble at each breath of air, and yet can heaviest burdens bear.
It holds most knowledge that has ever been said. But is not the brain, is not the head. To feathers and their masters, it's both bane and boonΒ One empty, and one full.
Plow and hoe, reap and sow, What soon does every farmer grow?
Lighter than what I am made of, More of me is hidden Than is seen.
Iβm grown from darkness but shine with a pale light. Very round I am and always a lady's delight.