Time travel

Stephen Hawkings believes that we will eventually be able to travel backwards of forwards in time.What causes him to ,slightly, doubt this eventuality, is the fact that we do not appear to be coming across visitors from the future presently.So are we being visited by people from the future in some guise that prevents us from realising who they are ?
If we could travel into the past we could wonder which of our senses would be overwhelmed the most. We could travel back to the middle ages, for example,seeing people as they actually were ,not just actors in film,or on T.V.Would they be courtous to one another ,or agressive or servile to the better dressed,would their clothing be drab or colourful?
Our hearing would surely be assaulted, loud voices ,unfamiliar accents,animal noises,etc.And then our sense of touch,would we recoil from any physical contact with these dirty strangers,invading, what we now refer to as, our 'personal space?
But probably the sense affected most of all would be our sense of smell.Nowadays we have all sorts of perfumes and potions used privately and publicly to cover up or eliminate smells and the causes of smells .So to travel back to a time when no-one was even conscious of their 'body odour'would definitely take our breath away.

What are we talking about??Even if we went back only 50 years I am sure our sense of smell would be assaulted...As a matter of fact I can remember a little cinema in Rathmines, in the late 40's or early 50's,called'' The Princess''....but on second thoughts ..lets not go there ..ever again...

But suppose someone had travelled forward from the 50's to the present day ...what would they see?..People walking along the street ,apparently ,holding chocolate bars up to their ears...or staring at the palms of their hands ,smiling quietly to themselves.The person from the past,would probably have returned to the 50's(smelly cinemas and all ) and advised all who would listen....''The Future?!Don't ever go there !!They have all gone stark staring....MAD...