The most basic time clock is the half life of the decay of atoms ... does it get changed by time dilation?

Goes to whether a pile of "stuff" will survive exactly the same time in two different backgrounds. You might for example send some "stuff" to a different background bring it back and compare it to some of the same "stuff" you kept with you.

Might be worth a search Bill S smile

Last edited by Orac; 05/31/16 06:25 AM.
I believe in "Evil, Bad, Ungodly fantasy science and maths", so I am undoubtedly wrong to you.