If time travel was ever possible, then why hasn't someone from the future come back to visit us?

 Boom Boom,

You might be able to identify which one Contact used?:)

The Super Hero Versions

Miracles StudiosThorne Plates

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To activate Thorne plates, the distance between each plate must be less than the width of an atom. The resulting wormhole will be equally small, so getting in and out might be difficult. To widen the portal, some scientists suggest using a laser to inject immense amounts of negative energy. In addition, Thorne believes that radiation effects created by gravitons, or particles of gravity, might fry you as you enter the wormhole. According to string theory, however, this probably won't happen, so it's scant reason to cancel your trip.

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To take you back one year, the string must weigh about half as much as the Milky Way galaxy. You'll need a mighty big spaceship to make that rectangle.

Many scientists believe the big bang that created the universe left behind cosmic strings - thin, infinitely long filaments of compressed matter. In 1991, Princeton physicist J. Richard Gott discovered that two of these structures, arranged in parallel and moving in opposite directions, would warp space-time to allow travel to the past. He later reworked the idea to involve a single cosmic-string loop. A Gott loop can take you back in time but not forward. The guide to building your own:

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This is a relatively slow method of time travel, and life inside the shell could become tedious.

In essence, a Gott shell is a huge concentration of mass. The shell's sheer density creates a gravitational field that slows down the clock for anyone enclosed within it. Outside, time rolls along at its familiar pace, but inside, it creeps. Thus the Gott shell is useful for travel into the future only. If you're planning a jaunt to the past using a Gott loop, you might want to bring along a Gott shell for the return trip. What to do, step by step:

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The cylinder must be infinitely long, which could add slightly to its cost.

Mass and energy act on space-time like a rock thrown into a pond: the bigger the rock, the bigger the ripples. Physicist W. J. van Stockum realized in 1937 that an immense cylinder spinning at near-light speed will stir space-time as though it were molasses, pulling it along as the cylinder turns. Although Van Stockum himself didn't recognize it, anyone orbiting such a cylinder in the direction of the spin will be caught in the current and, from the perspective of a distant observer, exceed the speed of light. The result: Time flows backward. Circle the cylinder in the other direction with just the right trajectory, and this machine can take you into the future as well. How it works:

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The Kerr ring is a one-way ticket. The black hole's gravity is so great that, once you step through it, you won't be able to return.

When Karl Schwarzschild solved Einstein's equations in 1917, he found that stars can collapse into infinitesimally small points in space - what we now call black holes. Four decades later, physicist Roy Kerr discovered that some stars are saved from total collapse and become rotating rings. Kerr didn't regard these rings as time machines. However, because their intense gravity distorts space-time, and because they permit large objects to enter on one side and exit on the other in one piece, Kerr-type black holes can serve as portals to the past or the future. If finding one with the proper dimensions is too much trouble, you can always build one yourself:

See:A User's Guide to Time Travel-Superpower Issue

There are of course objections(link) to this under the premise that Ronald Mallet presented.

 The Last Mimzy (link), is a toy rabbit.

Lets just say that by design,  the possibility existed that a mandala was cumultive speaking,  built to contain "your history of experience" and was a method by which "past information(lives)" was re-released in the present day?

So, you in essence have travelled back in time, and in that life, worked to model a  perspective in which to contain that life's work.  Then, knowing it will open up in the future?

I didn't know that! Guess I'll have to start watching it.

ETA: I'm watching it now - good show!

Interesting to see Casa Loma on last night's show.

oops - hope I didn't spoil it for you tonight!

Not sure if I have posted this before, but it's worth the read. Everyone does it the first time:

http://www.abyssandapex.com/200710-wikihistory.html

I hope this hasn't been posted here before.  A super handy crib sheet for gettin' things done, should you travel back in time.

Keep a copy in your wallet, just in case. It's not like you'll be able to log in to babble to check in when you're living in 1142AD.

I know! All this time travel can be so confusing!

Have you seen the time traveller in the Charlie Chaplin movie?

The Circus

Boom Boom started this thread a while ago.

Presumably hes been busy out there travelling. Dont get lost BB!

Tacyons? What the...?

I think what they are saying above, people like Hawking, is that travel to the past is technologically impossible for us at the moment. Technologically. 

Evolution and technological advancement should change that situation for us in a mere few thousand years. By then, man should consider traveling to the future not the past. The future is where we want to go.

Of course people from the future don't want to visit us.  They don't want to touch us, because they know where we've been AND where we'll be.

And Jackie could be right. Perhaps we as a species have no future. But what about other more successful and highly evolved species out there in the universe? Could they visit us from the future? Or if parallel universes do exist, and which could be anywhere from very much older to younger than this one, could they visit us?

ha! Good one.

"...for us physicists believe the separation between past, present, and future is only an illusion, although a convincing one."  - Albert Einstein

Out of the singularity was created everything in perfect symmetry. The past, present, and future exist simultaneously in space-time. Space-time can be curved. And if we travel in curvilinear motion, we could be constantly accelerating while time slows to a crawl. That sums up everything I've read about time travel.

Michio Kaku: Time Travel, Parallel Universes, and Reality YouTube

Many worlds? Yes, this is modern quantum theory. Time is a river that flows. And like a river, there can be whirlpools and even forks in the river of time. Time travel represents a problem for us though, because we would need to utilize the energy of a star to create a time machine.

Futuristic energy consumption by advancing states of civilization type according to Kardashev