Answer:
I have one eye, See near and far, I hold the moments you treasure, And the things that make you weep.
Hearing something unexpected or touching a live wire can have this effect.
Defends your noggin from the hard pavement
What has holes on each side, but can still can hold water?
The line a runner strives to reach
Before Google, we actually had to physically look things up in this building full of knowledge.