Everybody walks past a thousand story ideas every day. The good writers are the ones who see five or six of them. Most people don't see any.
Orson Scott

Comment preview: In reference to the Harry Potter time travel shenanigans: The problem with having a Deus Ex Machina is that you can only use it once (unless you want your story to be exceedingly shitty). This means that the only logical place to put it is at the end of t ....


Comment preview: I think this is the correct interpretation. If anyone who had a time machine made it their priority to kill Hitler, then Hitlers accepted manner of death in "current time" would be exactly that manner that the time traveller chose. That is difficult to fol ....


Comment preview: I just posted this in a thread yesterday, so I'm just going to copy/paste it here. >Even if time travel were possible at some point in the future, I don't believe that we'd ever necessarily just stumble on to time travelers for the following reason: &gt ....


Comment preview: You propose time travel that alters the person traveling through time, which doesn't make it time travel, it just makes it time. Like rewinding a tape and pressing play. There's several hypotheses for how time travel might work. There's the idea that you c ....


Comment preview: Me too. I find the following analogy helps my brain: Say you're in a car travelling north. Perfectly north. So, you're not travelling east or west at all. Now you turn the steering wheel to the right a bit. Now, you're travelling north slower than you were ....


Comment preview: **Using the example of Well's Time Machine with TM2 located inside TM1** **Premise** All objects inside TM2 will travel with TM2; all objects outside of TM2 but within TM1 would travel with TM1. **Case 1** TM1 travels backward in time; TM2 travels forward: ....


Comment preview: So there are a few possible reasons Hawking announced nobody came. 1. anyone who is capable of time travel in the future is not capable of understanding Hawking's invitation. 2. Stephen Hawking's invitation is unheard of by those capable of time travel in ....


Comment preview: Actually, this explains why we never see time travellers. Imagine this: on their first trip everyone tries to kill Hitler. 'Tries' is the key word here. No time traveller ever came to our time to gladly announce that they had killed Hitler, nd obviously f ....


Comment preview: There's a theory that the 88 miles per hour is actually needed to counteract the movement of the Earth. http://scifi.stackexchange.com/questions/14812/in-back-to-the-future-why-was-the-speed-88-miles-per-hour/50963 "A Delorean DMC-12 is 4216 mm long. When ....


Comment preview: Atoms are made of quantum particles, and quantum particles are just excitations in the quantum field. The quantum field is all around us, even in empty space. When you move, the excitations are traveling along the quantum field. You are now made up of a di ....


Comment preview: This is interesting because it forces any subsequent time travelers to think about the impact of their actions. I propose that Jack went on the Titanic for the sole purpose of saving Rose (he spent most of his time with her so its safe to say that if he ha ....


Comment preview: This is so friggin obvious: Recursive-Circular-Time-Loop-Paradox: Duh! The skull is there because the skull is there. It's that simple. In other words someone in the future (with time travel technology) is going through past news articles, and reads this s ....


Comment preview: That's purely subject to how the fourth dimension works, though. There's many different ways that non-linear time could work. * Completely linear, absolute timeline: What happens happens, and any attempts to time travel and change it means that the actual ....


Comment preview: If you were intent on traveling back in time to, say, kill Hitler then this means you have already failed. The 5 minutes from now you that is to travel back for the task will be called X. The you that is 5 minutes behind X in the present is Y. Y cannot po ....


Comment preview: > Something that's not hard to imagine that a machine can send you back or forward in time. It can't be a hot tub or a washing machine, or a car, a phone booth, or a remote control. I imagine it to be something big, massive, and requires a lot of energy ....


Comment preview: Everything, by nature of simply existing, is "moving" at the speed of light (which really has nothing to do with light: more on that later). Yes, that does include you. Our understanding of the universe is that the way that we perceive space and time as se ....


Comment preview: Here is an incredible answer by /u/ucorpuscle634 when this was asked a year ago in [this thread](http://www.reddit.com/r/explainlikeimfive/comments/22pi7o/eli5_why_does_light_travel/). I've copied and pasted it below because he deleted his answer for some ....


Comment preview: You might have heard of time dilation (it's popular in some space travel); whereby if a spaceship is travelling somewhere at a decent fraction of the speed of light, time will pass slower for the people on the ship than for those outside; so the ship may t ....


Comment preview: I tried to find at least a wiki article that names this theory/biologic effect, but I'm short on time so hopefully another redditer helps me out... Anways, what makes this time-travel conundrum worse is the idea that what we interperate as 'the present' is ....


Comment preview: Or they have decided that they should pose as normal people and not tell anyone that they are time travelers, because changing the past in such a significant way would alter the events that led up to their current time, which may cause them to cease to exi ....


Comment preview: The description is pretty funny. > Introducing the Flux Capacitor. Have the time of your life as you travel through time. Safe travels and Happy Back to the Future Day. > Makes time travel possible (if time travel were possible, but it s not yet) ....


Comment preview: This is false. If you were to travel at the speed of light (100% C) all travel would be instant. At "C" time and space = 0 for the perspective of the traveler. From a stationary view point you would be seen traveling at 299,792,458 meters per second, but ....


Comment preview: The net velocity of any given observer through 4D space-time is always c, the speed of light. Interestingly, c isn't really "the speed of light", but rather a conversion factor between spatial and temporal dimensions at which photons happen to travel: 3*10 ....


Comment preview: This would be the shittiest use of anything, because you would probably destroy the fabric of existence as we know it. Let's assume that time is linear for the sake of argument and that you aren't creating a parallel universe each time you travel to a dif ....


Comment preview: The first thing to realize here is people travel differently. Whether you think it is good or bad, worth it or not. Is entirely your opinion and most travellers could care less about others opinions of their travel. With that in mind, there are a ton of re ....