Answer:
The more of this there is the less you see. What is it?
I am the place where yesterday is always before today. What am I?
I've been around for millions of years, but I am no more than a month old. What am I?
I am quick when I’m thin. I am slow when I’m fat. Wind is my worst nightmare.
What has legs but doesn't walk?
The answer I give is yes, but what I mean is no. What was the question?