Answer:
It cannot be seen, cannot be felt, Cannot be heard, cannot be smelt. It lies behind stars and under hills And empty holes it fills. It comes first and follows after, Ends life, kills laughter.
Large as a mountain, small as a pea, Endlessly swimming in a water-less sea.
Looks like water, but it's heat. Sits on sand, lays on concrete. A play on the eyes, but it's all lies.
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
It's like food but water kills it. What is it?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.