You know, I’ve been thinking about this a lot lately – probably more than a retired guy should be thinking about fictional time machines, but here we are. Time travel in science fiction has gone through this massive shift over the past few decades, and as someone who’s spent forty years designing actual spacecraft while reading stories about impossible ones, I find the change fascinating… and a little depressing, if I’m being honest.
Back in the ’80s when I was still working on satellite propulsion systems, time travel stories were basically adventure rides with a science-y coating. Take Back to the Future – sure, the physics was complete nonsense (don’t get me started on the 1.21 gigawatts thing), but it wasn’t trying to be a physics textbook. It was asking a simple question: what if you could go back and fix things? Marty McFly accidentally screws up his parents’ meeting, spends ninety minutes fixing it, and boom – happy ending. The DeLorean was just a cool-looking plot device.
I remember watching that movie with my kids back then, and they were laughing at the skateboard chase scenes while I was mentally calculating whether a car-sized object could actually generate the energy needed for temporal displacement. (Spoiler: it can’t, not even close.) But that was fine! The movie knew it was ridiculous and embraced it. The science was window dressing for a story about family and growing up.
The Terminator, also from ’84, took a darker approach but still kept things relatively straightforward. Killer robot from the future comes back to prevent the resistance leader from being born. Simple premise, clear stakes. The time travel was a setup for an action movie, not the point of the story itself. As an engineer, I appreciated that they at least acknowledged some consequences – the whole “no fate but what we make” thing suggested they understood cause and effect, even if their actual time travel mechanism was never explained.
Then something started changing in the ’90s and 2000s. I was deep in my career then, working on increasingly sophisticated satellite systems, and I noticed science fiction getting more… complicated. Not necessarily more scientifically accurate, mind you – just more psychologically complex. Movies like 12 Monkeys turned time travel into this claustrophobic exploration of madness and predestination. Instead of “let’s go back and fix things,” it became “maybe nothing can be fixed and we’re all trapped by fate.”
The Butterfly Effect really drove this home for me. Ashton Kutcher’s character keeps trying to fix his past, but every change makes things worse. It was like watching someone debug code – you fix one problem and create three new ones. As someone who’d spent decades troubleshooting complex systems, that actually felt more realistic than the clean solutions of earlier movies, but it was also deeply unsettling.
Here’s what really gets me though – somewhere along the way, time travel stories stopped being about the technology and started being about trauma. Take Netflix’s Dark, which my wife and I binged during lockdown. (She kept a notebook to track the family connections because the show is basically a temporal family tree from hell.) Dark isn’t really about time machines at all – it’s about cycles of abuse, family secrets, and the way pain echoes across generations. The time travel is just a metaphor for how the past keeps contaminating the present.
Now, from an engineering perspective, I actually appreciate that modern stories treat time travel as something that comes with a cost. Real technology always has trade-offs, unintended consequences, maintenance requirements. But I miss the sense of wonder that earlier stories had. When did time travel become so… depressing?
Look at Arrival – which technically isn’t time travel but deals with non-linear time perception. It’s based on a Ted Chiang story, and Chiang actually does his homework scientifically. The linguistic approach to temporal perception is genuinely clever speculation. But the emotional core of the movie is about accepting loss, about choosing to live a life you know will contain heartbreak. It’s beautiful and devastating and nothing like the adventure stories I grew up reading.
I think part of what’s happening is that we’ve lost faith in the idea that problems can be solved cleanly. In the ’80s, time travel stories reflected the can-do attitude of the space race era I grew up in. We put men on the moon! We can fix anything if we just apply enough technology and determination! But modern time travel stories are written by people who’ve lived through decades of unintended consequences – environmental disasters, technological disruptions, the realization that every solution creates new problems.
The other thing is that the science itself has gotten more sophisticated, which creates new storytelling challenges. In the ’80s, most people didn’t know enough physics to spot the obvious errors, so writers could handwave whatever they wanted. Now everyone’s got Wikipedia and YouTube physics channels, so if you’re going to do time travel, you either need to work a lot harder on the science (like Primer did) or completely abandon any pretense of scientific accuracy and go full space fantasy.
What bugs me as an engineer is that we’ve somehow ended up with stories that are scientifically nonsensical but psychologically realistic, when what I’d love to see is the opposite – or better yet, both. Give me time travel that respects thermodynamics AND tells a hopeful story about human ingenuity. Greg Egan does this in his novels, but those never get adapted for movies because they’re too intellectually demanding.
I was talking to a former colleague about this recently – another retired aerospace guy who reads too much sci-fi – and he made an interesting point. He said modern time travel stories are really about information theory and quantum mechanics, not classical physics. The idea that the universe might branch into multiple timelines, that observation affects reality, that past and future might not be as fixed as we assumed. From that angle, shows like Dark are actually more scientifically informed than the straightforward causality of Back to the Future.
Maybe he’s right. Maybe I’m just nostalgic for a simpler time when time travel was about adventure instead of existential dread. But I can’t help thinking we’ve lost something important along the way. Science fiction is supposed to inspire wonder, right? It’s supposed to make us excited about possibilities, not convinced that every possibility leads to suffering.
Don’t get me wrong – I appreciate sophisticated storytelling. The character development in modern time travel stories is genuinely impressive. The way Looper explores identity by having Joseph Gordon-Levitt confront his older self is psychologically fascinating. The multi-generational trauma cycles in Dark are beautifully constructed. These are well-crafted stories that use time travel to explore deep themes about human nature.
But sometimes I just want to watch someone hop in a time machine and have an adventure without confronting the fundamental meaninglessness of existence, you know? Is that too much to ask?
I suppose what I’m really mourning is the loss of optimistic speculation. The best science fiction has always balanced scientific plausibility with human hope. We need stories that acknowledge complexity while still suggesting that intelligence and effort can make things better. Time travel stories used to do that – they said the future isn’t fixed, that individuals can make a difference, that problems can be solved even if the solutions are tricky.
Now they mostly seem to say that time is a flat circle and we’re all doomed to repeat our mistakes forever. That might be more philosophically sophisticated, but it’s also deeply discouraging. And as someone who spent his career actually trying to build the future, I find that shift both troubling and personally frustrating.
Maybe the next wave of time travel stories will find a way to be both scientifically literate and genuinely hopeful. Until then, I’ll keep re-watching Back to the Future and trying not to think too hard about the physics. Sometimes a DeLorean is just a DeLorean.
John spent forty years designing real spacecraft before turning his attention to fictional ones. Writing from Oregon, he brings a scientist’s curiosity to sci-fi—separating good speculation from bad physics while keeping his sense of wonder firmly intact.