Answer:
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
A serpent swam in a silver urn, A golden bird did in its mouth abide, The serpent drank the water, this in turn, Killed the serpent. Then the gold bird died.
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
What is always coming but never arrives?