I have thought about this matter for a while and have come to a conclusion that may be the existence of extra dimensions can be prove by the theory of special relativity of Albert Einstein. It can be done as follows
1- A carbon-14 isotope should be accelerated to about the speed of light. 2- If the decay of this isotope has taken place it means the time has not become zero this shows that there is the existence of extra dimensions where the optimum level of that dimension has not been reached resulting in the decay.
But if the decay becomes zero I am not sure how to conclude for it, can mean either of the two. 1) The existence of extra dimensions is wrong Or 2)The theory of special relativity is wrong.
Please share your views on this.