Time Travel. A History

Memories of anticipation, anticipation of memories. To make sense of the time loops narratologists draw symbolic diagrams. We may leave the details to the technicians and savor the new possibilities. Mixing memory and desire. The point is that for novelists as much as for physicists the timescape began to replace the landscape. The church of Marcel’s childhood is, for him, “an edifice occupying a space with, so to speak, four dimensions—the fourth being Time—extending over the centuries its nave which, from bay to bay, from chapel to chapel, seemed to vanquish and penetrate not only a few yards but epoch after epoch from which it emerged victorious.” The other great modernists—especially Joyce and Woolf—likewise made time their canvas and their subject. For all of them, Phyllis Rose has observed, “the prose line wandered in time and space, with any moment in the present acting as a kind of diving platform offering access to a lake of memory, anticipation, and association.” Storytelling is unchronological. It is anachronistic. If you are Proust, the narrative of life blends into the life: “life being so unchronological, so anachronistic in its disordering of our days.” The narrative itself is the time machine, and memory is the fuel.

Like H. G. Wells, Proust absorbed the new geology. He digs in his own buried strata: “All these memories added to one another now formed a single mass, but one could still distinguish between them—between the oldest, and those that were more recent, born of a fragrance, and then those that were only memories belonging to another person from whom I had learned them—if not fissures, if not true faults, at least that veining, that variegation of coloring, which in certain rocks, in certain marbles, reveal differences in origin, in age, in ‘formation.’ ” We might criticize Proust’s view of memory as merely poetic if our modern neuroscientists had settled on a more authoritative model of how memory works, but they have not. Even with the example of computer storage to draw on, even with our detailed neuroanatomies of the hippocampus and the amygdala, no one can really explain how memories are formed and retrieved. Nor can anyone explain away Proust’s paradoxical contention: that the past cannot truly be recovered by searching our memories, by interrogating them, by rewinding the film or reaching back into the drawer; rather, that the essence of the past, when it comes to us at all, comes unbidden.

He invented the term “involuntary memory” for this. He warned: “It is a waste of effort for us to try to summon it, all the exertions of our intelligence are useless. The past is hidden outside the realm of our intelligence and beyond its reach.” We may think, peering naïvely into our minds, that we have formed our memories and may now call them up for leisurely inspection, but no, the memory we reach for, the memory of the conscious will, is an illusion. “The information it gives about the past preserves nothing of the past itself.” Our intelligence rewrites and rewrites again the story it is trying to recall. “The mind feels overtaken by itself; when it, the seeker, is also the obscure country where it must seek.” Involuntary memory is the grail for which we may not quest. We don’t find it; it finds us. It may lie hidden perchance in a material object—“in the sensation that this material object would give us”—for example, oh, the taste of a petite madeleine dipped in lime-blossom tea. It may come in the liminal space between waking and sleep. “Then the confusion among the disordered worlds will be complete, the magic armchair will send him traveling at top speed through time and space.”

All things considered, it may seem surprising that it took psychologists sixty more years to define this phenomenon and give it the name “mental time travel,” but they have done that now. A neuroscientist in Canada, Endel Tulving, coined the term for what he called “episodic memory” in the 1970s and 1980s. “Remembering, for the rememberer, is mental time travel,” he wrote, “a sort of reliving of something that happened in the past.” Or the future, naturally. (It’s a poor sort of memory that only works backward, remember.) It’s MTT, for short, and researchers debate whether it is a uniquely human capability or whether monkeys and birds may also revisit their pasts and project themselves into the future. A more recent definition by two cognitive scientists: “Mental time travel is the ability to mentally project oneself backward in time to relive past experiences and forward in time to pre-live possible future experiences. Previous work has focused on MTT in its voluntary form. Here, we introduce the notion of involuntary MTT.” In other words, “involuntary (spontaneous) mental time travel into the past and future.” No mention of madeleines, though.