Answer:
What can be seen but never found that only hides in the unwound?
I never was, am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, To live and breath on this terrestrial ball.
Both old people and owls are said to be possessing this trait
When it is alive we sing, when it is dead we clap our hands. What is it?
I'm light as a feather, yet the strongest man can't hold me for more than 5 minutes.
People take me on walks and I run and have fun. What am I?