Answer:
Sometimes I fly as fast as the speed of light. Sometime I crawl as slow as a snail. Unknown until I am measured but you will certainly miss me when Iβm gone.
The more there is the less you see.
I am longer than a decade and shorter than a millennium
My head bobs lazily in the sun. You think I'm cute, for my face is yellow, my hair is white and my body is green. What am I?
I am full of holes but still holds water.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?