I think that the time is the most essential question of existance. All other question tourns around the time.
In my understanding.
Nature of time is Anicca. Why?
Because the time is the quantity of information per unity of consciousness / quantity of energy per unity of space
Nature of energy is anicca, nature of information is anicca.
When there is a lot of energy/information or a lot of consciousness, the time stream goes slowely (slowely means that for 1 conscious moment they have the same quantity of information that 10 moment of annother / for the 1 unity of space they have tha same quantity of energy that 10 of an another).
Thants why celestial beings have a burning/light body and have a most important life span agains our, and thats why in hell realms beings rebirn thousands and thousands times, cause the energy that they can "absorb" is very little cause they dont have developped consciousness, and if they performed an action of value "1" in human realm, they have to "absorb" this action per 0.00...001 during one life in lower realms, so to be absorbed this kamma must be lived 999..999 times.
I hope some body will understant that i mean
So conclution is that we must be AWERE if we want to reach the and of our kamma fastly