Part I: The Silence Between Now and Tomorrow
In 2009, physicist Stephen Hawking held a party for time travellers.
There were balloons. Champagne. A neatly prepared table. Everything one might expect from a respectable gathering—except for one unusual detail. Hawking deliberately waited until after the party had finished before sending the invitations. His reasoning was elegantly simple. If humanity ever discovers time travel, then surely someone from the future could still travel back and attend.
Nobody came.
Hawking jokingly described the evening as experimental evidence against backward time travel. It was classic Hawking: playful, provocative, and just serious enough to leave everyone wondering what, exactly, had been tested. Had he demonstrated that travelling to the past is impossible? Or had he merely revealed how many assumptions we make before we even begin asking questions about time?
Those assumptions are older than modern physics.
More than four hundred years earlier, William Shakespeare placed one of the most enduring descriptions of uncertainty into the mouth of Hamlet. Reflecting on life, suffering, and the temptation of death, Hamlet pauses because beyond death lies “the undiscovered country from whose bourn no traveller returns.” The phrase has echoed through literature ever since because it captures something profoundly human. Death frightens Hamlet not simply because it ends life, but because it cannot be known. No one returns to tell us what lies beyond.
Recently, I watched a troupe of thespians perform the famous earlier part of Hamlet’s famous soliloquy ( see how many you can name: hint, Eddie Redmayne is not one of them). What struck me was not simply the brilliance of the acting but the way meaning shifted through emphasis. The words themselves never changed. Shakespeare’s text remained exactly as it had been for centuries. Yet by placing stress on different words, lingering over unexpected phrases, or allowing silence to interrupt familiar rhythms, entirely new meanings emerged. It reminded me that understanding often comes not from discovering new information but from hearing familiar ideas differently.
Perhaps that is why Shakespeare’s phrase has enjoyed such a remarkable afterlife.
In Star Trek VI: The Undiscovered Country, Shakespeare’s words become the title of a story about politics rather than mortality. The reference is deliberate, yet something subtle has changed. Shakespeare’s undiscovered country was death. Star Trek transforms it into the future itself. The Federation and the Klingon Empire stand at the end of generations of hostility, facing a tomorrow neither side truly understands.
Yet the film’s most revealing scene is not a battle or a negotiation. It is a dinner.
Chancellor Gorkon raises a toast “to the undiscovered country… the future.” Around the table, however, optimism quickly gives way to suspicion, inherited prejudice, old grievances, and political posturing. Each side retreats almost instinctively into familiar narratives about the other. Later, Captain Kirk quietly observes, “People can be very frightened of change.” The film suggests that the greatest obstacle to the future is not the future itself but our inability to escape the stories we inherited from yesterday. Long before tomorrow arrives, we have often decided what tomorrow must look like.
That small shift fascinates me.
The words remain the same.
The emphasis changes.
Perhaps Hawking made the same shift. His party was not really about death. Nor was it simply about time travel. It was about whether someone from the future could cross the boundary separating tomorrow from today or just dwell in the pasts narrative.
Yet I find myself wondering whether the most interesting experiment is even simpler than Hawking’s.
Imagine you are sitting in a café with a friend discussing time travel. The conversation drifts from DeLoreans accelerating to eighty-eight miles per hour, to blue police boxes that are somehow bigger on the inside, to phone booths disappearing in flashes of light. Before long you are discussing wormholes, quantum mechanics, grandfather paradoxes, bootstrap loops, and all the wonderfully impossible ideas that science fiction has spent decades inviting us to imagine.
Eventually one of you proposes a simple agreement.
“If time travel is ever invented,” your friend says, “and one of us ever gets access to it, let’s make a promise. Come back to this exact moment. Right here. Right now. Interrupt this conversation and tell our younger selves that you succeeded.”
You shake hands.
The agreement is made.
Then you wait.
Five seconds.
Ten seconds.
A minute.
Nothing happens.
At first glance the experiment appears to prove exactly what Hawking’s party seemed to prove. If time travel were ever going to exist, surely someone would already have appeared.
But before accepting that conclusion, I wonder if another question should come first.
What assumption have we just made?
Without even noticing it, we have assumed that the future already exists.
We imagine tomorrow as a completed destination. Somewhere beyond the horizon there already exists an older version of ourselves capable of deciding whether to return. We picture history as though it were a finished novel whose final chapter has already been written. The only remaining question, we assume, is whether someone has discovered a way to flip backwards through the pages.
Yet why should we assume that?
Perhaps the silence tells us nothing about time travel.
Perhaps it tells us everything about the way we imagine time itself.
The older I become, the less interested I am in whether time travel is scientifically possible and the more interested I become in why these thought experiments feel so compelling. They reveal something profoundly human. We long for certainty. We want reassurance that our fears are misplaced or confirmation that our hopes are justified. We want someone from tomorrow to tell us whether today’s choices matter. We want the future to lean back across time and whisper that everything will be alright.
No one comes.
The silence unsettles us because we mistake it for absence.
But perhaps the silence is not empty.
Perhaps it is asking a different question.
What if the future is not silent because nobody has travelled back?
What if the future is silent because there is no future there yet to send anyone?
That possibility changes everything.
It changes the café experiment.
It changes Hawking’s party.
It even changes Shakespeare.
Perhaps the undiscovered country remains undiscovered not because no traveller returns, but because it has not yet fully come into being.
If that is true, then our stories about time travel are not really stories about travelling through time.
They are stories about what we believe tomorrow already is.
For Marty McFly, the future is fragile—alter the past and tomorrow shifts with it. Kyle Reese inhabits a future that feels fixed and inescapable, where every choice is shaped by memories of a war yet to come. Bill and Ted move through a world where paradoxes resolve themselves, as if history already knows its own outcome. Benjamin Sisko encounters beings who experience all moments at once, while James Cole struggles against a future that resists change, even as the Travellers find it constantly adjusting to present decisions.
Each of these stories seems to circle the same question:
Can we travel through time?
But perhaps they are really asking something deeper:
What kind of thing is the future?
Before we can decide whether tomorrow can be changed, we must first consider whether it already exists.
That question has occupied physicists, philosophers, storytellers, and theologians for centuries—and it may explain why we spend so much of our lives inhabiting futures that have not yet arrived.
Part two is comming soon… or is it?