Answer:
I have a face, yet no senses. But I don't really care, because time is of the essence.
Come up and let us go. Go down and here we stay.
What kind of table has no legs?
It's been around for millions of years, but is never more than a month old. What is it?
In the night a mountain, in the morning a meadow.
I appear in the morning. But am always there. You can never see me. Though I am everywhere. By night I am gone, though I sometimes never was. Nothing can defeat me. But I am easily gone.