SpaceTime

Every thing* in our universe is in a state of change.

Space is the extent of the change. Time is the rate of change. 

All objects and events are constituents of space, and travel at velocities 
and for time durations that correspond to their changing states.

Space and time are inseparable. One is not possible without the other.


* (thing refers to any constituent of space, any object or event)
 
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