Answer:
Come up and let us go. Go down and here we stay
In many years, not much has happened. In many minutes, a lot has happened. In one second, everything has happened.
More precious than gold, but cannot be bought, Can never be sold, only earned if itโs sought, If it is broken it can still be mended, At birth it canโt start nor by death is it ended.
Who eats a lot of iron without getting sick?
What's a place you have left but didn't enter?
If itโs information you seek, come and see me. If itโs pairs of letters you need, I have consecutively three. What am I?