Answer:
The dirtier I get, the whiter I am. What am I?
I transfer oxygen from the atmosphere to your blood
I am gentle enough to soothe your skin light enough to fly in the sky and strong enough to crack rocks.
I can sizzle like bacon. I am made from an egg. I have plenty of backbone but lack a good leg. I peel layers like onions but still remain whole. I can be long like a flagpole yet fit in a hole.
I go around in circles, but always straight ahead. Never complain, no matter where I am led. What am I?
I fly to any foreign parts assisted by my spreading wings. My body holds an hundred hearts Nay I will tell you stranger things when I am not in haste I ride and then I mend my pace anon.