Although we have been told it is best to live in the moment, it is difficult to resist the pull of nostalgia from an untold number of stimuli.

The bite of a madeleine is known for producing a flood of memories in Proust’s, À la recherche du temps perdu. Andy Warhol changed his perfume often marking a period of months, so that by taking a whiff from one of his many bottles, he could evoke a specific frame of time. Sometimes while looking at ourselves in a photograph, we may feel as if we are there again. A song can transport us to another moment in our lives.

The senses seem to be ever ready to pull us back into the past.

Yet there are those who question the possibility of time travel.