The assumption that is questionable in this theory is whether aging which is caused by meta physical

How, if yes then? Is it really possible? A lot of street plays and cinemas such as 'Back to the Future' cheap car rental london have built a lot of plots that revolve around time traveller moving from one time zone to the other. Travelling from 1972 to 1942 or travelling from 2009 to 2042 just like travelling from New York to Washington DC.
(Time dilation) So in essence he has travelled time or has travelled to the future. So in effect cheap car rental london the person who experiences 50 years on the space craft will see that 400 years have elapsed on the surface of the Earth. The theory suggests that the time experienced by the traveller would be different from the time experienced by the person on the Earth. The idea revolves around relative time experience of two travellers one who stays back on the earth and the other who travells inside a space craft at nearly the speed of light.
The assumption that is questionable in this theory is whether aging which is caused by meta physical phenomena will also be influenced by time dilation cheap car rental london or whether time itself is more universal as per which a person will age rather cheap car rental london than relative time which causes a persons motion into the future.
) A universe in which he exists now and a universe where he does not exist( where his grandad and grandmom do not get married, this is explained by multiple universes. In this case can he exist now? This is the famous Grandfather paradox where a traveller when he travels cheap car rental london to the past could stop his grandfather from getting married to his grandmother. Travelling to the past is unlikely as it will affect the principle of causation. . So can one travel cheap car rental london to the past? Atomic clocks have shown to experience time dilation when one is accelerated to near light speed.
! So what we can see in the future is that technology being developed where a traveller will remain in motion for 10 years and return to the earth after 400 years and our future human civilizations will witness time travel after all! Even great yogis such as Swami Yogandanda have verified that time travel is possible as some yogis in the past have disappeared as light and reappeared after eons and ages.