Answer:
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
What runs but never walks has a mouth but never talks has a head but never weeps has a bed but never sleeps?
I hold two people together but touch only one. What am I?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I cannot be felt seen or touched. Yet I can be found in everybody. My existence is always in debate. Yet I have my own style of music.
Before Google, we actually had to physically look things up in this building full of knowledge.