In the context of movement (change), time does not actually exist. Upon the invention of time (language-numbers) we now have an agreement dividing the series of movements into the 'context of time'. We invent histories and extrapolations (i.e. 'future'), all which don't exist but are derived from the context of movement. We essentially live in the context of time inventing a series of now's, instead of actual Now. Can 'time-travel' actually take place? Probably not, since travel (getting from A to B) occurs objectively (physical) and is prior to the concept of time, not the other way around. We can only really 'travel' or go somewhere in physical world allowed for by the body (biological) interacting with its environment. If time does not exist, and serves only as a useful invention, then age may not exist. Just a series of biological changes. More contemplating... Thank you.