RESULT: Time
Until I am measured I am not known, Yet how you miss me When I have flown.
Who am I ?
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 I’m gone. What am I?
Fastest traveller ever known, and never do I slumber. Ere you move I'm long since flown, A letter bears my number. But for all my matchless speed, The ancient and immobile tree, Responding to a primal need, Traps and trains my energy. What am I?