You are making a common, but fatal error in your assumptions. Time is not a constant; rather, time is variable and it is relative to your reference frame. Ergo, there is no fundamental "unit" or "mass" or "speed" of time.

At sufficient velocity (speed of light) there is <u>no</u> time, although it is impossible to get mass upto that speed. However, at speeds close to the speed of light, time slows to near-infinite slowness...

Bryan

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