Answer:
I am black of eye and bright of hair. I fast into the ground and follow my lord as he races around the world. What am I?
I have a brother. However much we run we do not reach each other.
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
I see what you see feel what you feel and hear what you hear. I know all of your moves before you make them. I even know the moves you didn't make.
What gets broken without being held?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.