Answer:
They are Dark, and always on the run. without the sun, would be none!
Before Google, we actually had to physically look things up in this building full of knowledge.
Low on cash? Pick out items from this rack.
What is always coming every day, but never arrives until the next?
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.