In popular culture, ghosts are often represented as a snapshot of a moment in time, endlessly repeated. Mostly these snapshots relate to incidents from the past - eg. a headless horseman, Mary Queen of Scots and the like.

Setting aside disbelief/ scientific scepticism about ghosts generally, is there any theory that would explain why ghosts could not equally appear from the future?

I was wondering about the plausibility of a "joke theory" I saw in an online web comic (www.qwantz.com not sure where it is anymore though). Essentially it suggested that all electrons are the same electron except it just travels through time - explaining their being identical.

Originally I almost dismissed the idea pretty quickly. However, since reading the most recent New Scientist in which the main article said that quantum particles such as electrons and photons have no place on the arrow of time (or something like that). It seems that this theory is more plausible if not just for me.

At least in the case that the electron has "failed to kill itself" (/will fail to kill itself / is currently failing to kill itself).

Thanks for your views and help in advance!

If we hypothetically had the technology to travel 70 million light years away in an instant, along with some form of powerful telescope...when you looked at earth would you see earth as it was 70 million years ago, dinosaurs and all?

Planet X, aka Nibiru, has a 3000 year orbit around the sun, has anybody else heard of it?

Hypotheticaly, If time travel existed and we could go forwards and backwards in time; and you created a paradox in which your existence never was (the grandfather/mad scientist theory) and there WAS an afterlife how humans percieve it currently; (soul leaving the body and entering a spirit world/universe) could the soul enter or would the soul seise to exist too? For instance, the spirit world would have to have no concept of time and space as A) everyone would age and B) it would run out of space eventually as noone would be leaving it. Technically you and your soul would of existed once, and as the soul can survive without your physical presence, couldn't it survive without a physical existence, especially as it can pass through worlds?

I know that answers will be based on alot of 'perhaps' and 'maybes' but i'm very interested in what others think on this.

Sounds implausible at first doesn't it? Here is how it might theoretically be possible. Can you prove me wrong?

Stephen Hawkings agrees it is theoreticaly possible to travel into the future by accelerating a person or object to near the speed of light. Travelling to the past however does not seem possible so that person would be permanently in the future. They would also be unable to communicate with us using current technology snce that would involve sending something into the pas which is theoretically implausible.

Here is where spooky physics might help us. When two particles are entangled and the properties of one changes the properties of the second particle change identically and instantaneously even if the particles are spatially separated. Experiments have already shown this to be true. Assume someone were to invent a pair of linked quantum channel devices. Now send one of the devices into the future just like Staphen Hawkings suggests. If the particles remain entangled would be then be able to have two way communications with someone from the future?

If time slows for the observer as they approach the speed of light, would it stop all together if you actually attained light speed, effectively resulting in instantanious travel anywhere in the universe? What if you exceeded it? does time actually move backward or would the "direction" of time travel be dependant on your direction of movement?

From NewScientist.com-

"This is a tale of two spacecraft. Pioneer 10 was launched in 1972; Pioneer 11 a year later. By now both craft should be drifting off into deep space with no one watching. However, their trajectories have proved far too fascinating to ignore.

That's because something has been pulling - or pushing - on them, causing them to speed up. The resulting acceleration is tiny, less than a nanometre per second per second. That's equivalent to just one ten-billionth of the gravity at Earth's surface, but it is enough to have shifted Pioneer 10 some 400,000 kilometres off track. NASA lost touch with Pioneer 11 in 1995, but up to that point it was experiencing exactly the same deviation as its sister probe. So what is causing it?"

Other things I have read about time have led me to wonder if maybe the craft aren't moving faster, but rather our perception of time is changing.

Another user on this site asked if time travel might be possible by further expanding or re-collapsing the universe to speed up or "rewind" time. I don't think traveling back in history could be done using this method, but it may be like flooring the gas or pushing the brake on time itself. He also pointed out that what we perceive as "time" is a dimension probably restricted to this universe, but because of that it may be pushing against the limits of its ever-expanding confines. If he's correct, then might time be "stretching" to fill the universe, thereby "stretching" our perception of it?

Just an idea to toss around.