Answer:
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
My first two letters say my name. My last letter asks a question. What I embrace I destroy.
What room do ghosts avoid?
I am an odd number. Take away one letter and I become even. What number am I?
Drop me and the world will shatter. You can always find me where you empty your bladder. What am I?
Before Google, we actually had to physically look things up in this building full of knowledge.