A few years ago, my friends Gary and Matt joined me for lunch. Consider yourself warned of the geekiness of our conversation, and invited to revel in it as we did. Slouching over trays of paper-wrapped burritos and various stages of hot sauce, we discussed all things electronic, computer wizardry, our latest attempts to get laid, and science fiction movie plots.
The subject of time travel reared its ugly head, one of my least favorite, and I settled in to patiently suffer it until we moved on to something a bit more to my liking. Time travel is all good and well for kids to talk about, how they’d give themselves a million dollars with interest and such, but it’s fundamentally absurd, and strikes me as a completely boring waste of time, like giving serious analysis to the subject of the Easter bunny or the physics of Santa Claus.
Once in awhile, when you’re discussing things that merely border on completely impossible, someone walks away from lunch with a sketch of the first transistor, or a design for a better Internet, or a microbe that spins straw into gold. Time travel, by virtue of being provably impossible, lacks all such merits.
That day was especially trying. Gary was pontificating intensely on quantum theory and its implications for time travel, as though he thought it a serious subject. I did my best to shut him down with my usual speech about paradoxes, huge amounts of energy required to create wormholes, and causality, and finished off with my segue into the particulars of the space-time continuum, hoping it would work its usual magic of gracefully going somewhere more productive.
He postulated, half seriously, that the whole notion behind quantum theory is that the Universe makes it up as it goes along, that causality is an illusion resulting from the fact that our measurements of the world around us cause the world to come into being, and even more bizarre, the possibility that the world around us is nothing more than the sum of our observations.
Philosophy on that scale was too heavy a dessert to go with refried beans, and again I found myself heaving a half-hearted sigh on behalf of longsuffering friendship and the burdens borne in the course of it. But instead of the gutter ball result, instead of defaulting to threadbare debate over the nature of reality and our perceptions thereof, things took an altogether surprisingly practical turn.
Gary suggested that time as we experience it is a bit like a two-way street on a foggy night, except that it only comes into being as we travel it, and ceases to exist after we pass. Moreover, causing time to flow backward, or forward at different rates, should be a simple matter of measuring time differently. Conceivably, because we weren’t chasing exotic particles, it wouldn’t take an accelerator, or any energy-intensive machinery. Maybe some superconductors, or magnets maybe, but certainly nothing large, or even difficult to engineer. One can measure the speed of light with a wheel of mirrors, technology that’s been around for aeons. Not only might time travel be possible, but even as simple as properly assembling a box of popsicle sticks.
I loaned Gary and Matt all of my spare processor time over the next few months. While I was busy going to work and seeing my hot new girlfriend, they were busy trading excited theoretical chatter late into the night. Instant messaging was the tip of the iceberg between them as gigabytes charged silently through the aether between them. My computers did their part as workhorses, running bizarre simulations of imaginary constructs. It was all complete frivolity, so I cared not in the least, and Gary was serious enough that he might make a bigger better widget out of whatever nonsense they were working on.
A year and a half drifted by. I got engaged. I was promoted just a little bit at work. I bought a house. My car died twice. It was a busy year, just getting the rent paid. We went out and had more burritos.
A good friend would have been more attentive, and contained his surprise better than I did, when Matt pulled an anti-stat bag out of his laptop case and handed it to me, containing something that looked like a movie prop with a USB plug on one end. An eight-inch long wand, it looked eerily like a prototype warp nacelle shrunk to the point that it could have USB 2.0 drivers.
“Where in the world do you get linux drivers for a flux capacitor,” I quipped, getting looks that meant I was running late to this very meeting and was only just realizing it.
It was the prototype, and maybe it wouldn’t hurt me to read my email just a little bit more closely, but who could blame me? Life gets busy when you’re busy keeping a roof over your head, and paying a cell phone bill.
Gary whipped out his laptop, practically yanked his magnum opus out of my hands, popped it into place, and fired up the whole conglomerate. Movies have us accustomed to seeing neon on anything futuristic or special, so it was a bit anticlimactic to see nothing beyond a far more pedestrian set of green and amber LED’s. Matt set a container of salsa in front of the whole setup, and sat back to watch as Gary prodded his computer and asked for its cooperation.
Again, popular culture has taught us to expect a crackle in the air, maybe a faint hum, or even an explosion. What I saw was unnerving, unassuming, and completely earth-shattering. As I watched the table, the bowl of salsa crusted over, browned, and molded, all in the space of a few seconds. I’d like to pretend I was completely confused, that like any normal person, I had no frame of reference from which to figure out what was going on. But this was lunch with Matt and Gary, and they were far too nerdy to do this all as a setup. Their ADD wouldn’t have held up against the strain. So when my jaw hit the floor, it wasn’t surprise at what I was seeing, but rather that they’d succeeded to press such a device into service. And as quickly as my mind grasped what was happening, the entire process reversed, and the salsa snapped back into its previous state.
I felt wildly nauseous, from nerves no doubt. But Matt grabbed a bag and threw up. Gary turned six shades of green before my eyes, and assured me that the nausea was a “normal” side effect of their experiment, probably a disruption in the background radiation of the room or something. The salsa was being shoved forward in time, living in its own little bubble of reality and caring not for the timelines of others in the least. He noted that while they could maintain the bubble indefinitely, with a displacement of several weeks, it invariably snapped back into place when the contraption was turned off.
It seemed absurd that I should still be able to watch what was going on inside the bubble. Oughtn’t light be unable to penetrate the disruption going or coming? Matt, still wiping used chalupa from his face, made a rude gesture implying that I was born with diminished mental capacity. Apparently the speed of light is a constant, and any cataleptic physics student should know this.
They had parked a camera inside the bubble a couple times, and showed me some very convincing footage that looked an awful lot like it was paused unless it was run at 16x. The conversation turned back to theory and conjecture, and I was suddenly more comfortable in my own skin again. How could one slow time down in the bubble? Could you invert the distortion by putting another device inside? Could the distortion run backward in time? What would the impact be on causality? Gary surmised that one would take their causality with them whenever and wherever he went, and the rest of the future would continue blithely unaware, like the difference between algae in a river and frogs swimming ashore. Inventing time travel, as far as he was concerned, was an obvious natural progression, as inevitable as walking upright. I had some questions about that one, but he was undeterred. They would find a way to make it work, make it useful, and maybe even sell it.
Six months passed. Or so I thought.
Gary came to our next lunch looking tired, but excited nonetheless. We talked about everything under the sun except his project. Finally I asked if he’d brought it along. Not today. It wasn’t ready for public perusal, and had stayed home. Matt was designing a drainage project in Thailand, and a handful of five-minute conversations with each of us was the extent of our interaction. He wouldn’t be showing up for this lunch, obviously.
Gary confided that he’d spent half his life savings, almost $12,000, on electronics and computer parts, and that his long hours on the project were rewarding and making fast progress, but turning his wife and kids into strangers. His intent that day was, it turns out, to ask my advice on giving up the project altogether. After all, time travel is a matter of fantasy and H.G. Wells stories, is it not?
I asked him what he’d learned so far, and why he was still working on something so ethereal with such dedication. He was toying with the possibility not only of human time travel, but specifically of traveling into the past.
The process, it turns out, is a bit of a mind twist. It starts out, he said, like looking out the rear window of a station wagon as it rolls down the tracks. Then it enters a distinct second phase a bit like rewinding a movie a frame at a time. Specifically, just as movie frames simulate continuity played forward, they also display a different type of continuity when played in reverse order. A mind must be present to comprehend the flow of a motion picture, and he suspected, reality itself.
It was on this point that he had reached a stopping point. The human mind was insufficient to comprehend the gritty nature of reality, and despite their mathematical power, computers were merely passive observers with no real power to understand the flow of time. In order to do what was needed, he would need a much more elegant artificial intelligence to be programmed.
He’d got so far already with the theory, and with the early experiments. The salsa from our previous meeting still stuck in my mind. It was difficult to set aside at this point, like someone three payments away from owning their car. He described the feeling of being on the brink of ultimate success, and staying on the brink for most of a year.
I suggested taking lots of notes in case something happened, and then boxing the project up for an entire month, not only to get it out of his system, but also to increase his chances of a major breakthrough when he came back. We finished our tom yum, and he left.
Two years later, I’d heard little from either one of them when I stumbled upon Matt at the gas station. He was done with Thai drainage projects, but neither of us had from Gary since my last lunch meeting with him. No fight, no dramatic denouement, just drifting in our own separate directions. Matt and I decided upon a reunion, and a week later we were at a bar sitting in front of some very old, very expensive scotch. I felt like an elitist, but it was a fun moment.
The conversation drifted over a host of subjects, including Gary’s near-divorce the last time we’d spoken. Gary looked well, and still wore his wedding ring, not the sort of thing you’d expect had he doggedly continued to pursue a fantastic project. Which is how we came upon the time machine subject.
“Oh that.”
Nonchalant, we could tell it was a past project, something he was done with. And there had been nothing on the news, no earth-shaking reports, no odd blacked-out government vans in our neighborhood conducting super-secret shadow operations. So Matt and I already knew from Gary’s response how the project had turned out.
Except that we were completely wrong.
“I made notes like you suggested, and put them in a box. I didn’t even go back after a month to open it up. It was three months before I tripped over the box taking Christmas ornaments out of the attic. Only my prototype device was completely assembled, and the notes were finished. The gaps were filled in. In my own handwriting.”
We were stunned. We assume he probably was at that moment as well.
“Talk about a load off my mind. It took away all of the suspense the way it would when someone tells you the good guy lives to the end of the movie. I knew by that point that I’d figure out the process eventually, and I relaxed,” he explained.
“So did you use it? How does it work? Can people use it to travel? How are you supposed to figure out the rest of the process if you’ve already got the answers?” Matt was a mess of questions.
“Okay first off, information is as real a thing as matter or energy,” replied Gary. “Information can travel through time as well as people. So as long as I eventually build a prototype into a fully functioning unit, I can go back, swap out the completed notes and unit for the partial ones, and burn them if I so choose. Yes, I have used it to travel. It’s a bit disorienting at first, especially considering the bizarre extended episodes of deja vu that come as a side effect.”
“You get deja vu?” I chuckled.
“As it turns out, the feeling of deja vu is how humans perceive local time displacement. As far as I can tell, it’s like radiation, and something like one in every hundred people will feel it within ten miles. But I’ll tell you what, when you’re the one travelling, it’s strong, it’s extended like a lucid dream, and it is STRANGE.”
“So where did you go?” asked Matt. “Did you shake hands with Lincoln or anything like that?”
“I might eventually,” came the hum-drum reply. “I’ve just been spending time with my family. Lots of it. They think I got a big bonus at work and a promotion, but it seems at some point I’ll be going back to the seventies and putting some money in a bank account. So I’ve still been working part time, and spending a few hours each day on the project, but mostly we’ve been taking a nice long vacation to rebuild. I’ve been getting to know my kids better. I’ve been visiting family and friends out of state for days at a time, and if they ever compare notes it’ll be very confusing indeed.
“But mostly, I use it to be two places at once. I keep it straight by assigning letters to the timeline, and leaving notes for myself. I’ll be at the same job for awhile, so I’ve filled in for myself for weeks on end. Myself, A, the original timeline version of me, took a vacation to tour Africa for six weeks while B, my future self, held down the fort. I’m going back in a few months to start building Somalia into a safe haven.”
“Yeah, don’t get killed while you’re there, two timelines with one stone,” giggled Matt.
“That’s the invincibility angle of it,” gloated Gary. “I don’t want to know when I die, but I travel ahead and make sure I come out of my little ‘missions’ the same way I went in. If I don’t, I don’t go. I’ve already looked ahead, and the Somalia thing turns out great. I take some guys, some boats, and bring fresh water to the desert. But mostly, I spend time with my family. Things are great.”
So it turns out, having found the secret of time travel and at least partial invicibility… he mostly watches the kids playing soccer and takes his wife out to dinner.