41. Wormholes And Time Machines An overview of the effects of a wormhole and the models of time travel machines which use wormholes.Category Science Physics Relativity Black Holes Wormholes...... travelling from the stationary mouth to the moving and back again could then senda traveller back in time. How time travel is possible, the Twin Paradox . http://www.dd.chalmers.se/~f93jojo/sidan2.htm

WORMHOLES AND TIME MACHINES -a project in the course Black Holes at Chalmers University of Technology by Fredrik Berndtson, John Gunnarsson and Johan Johansson Introduction In many science fiction books and films one often find the story of people travelling backward or forward in time. How many haven't seen the film "Back to the Future", where Michael J. Fox travels back in time to where his mother and father where young and then his mother falls in love with him instead of his father and therefore he ceases to exist. That is science fiction but what is really allowed if one take into account the Law of Physics? Is it possible to travel in time and is it possible to change the past and therefore also change the present? We should here try to give a short description of what physicist know about time travels today. To be able to talk about time travels we will first have to explain what a wormhole is. Description of a wormhole A wormhole is a geometry of four-dimensional spacetime (for an explanation of spacetime see "spacetime"

42. BBCi - Space - Time Travel Gravity, black holes, singularity and mini wormholes.Category Science Physics Relativity time Travel...... The idea of travelling forward into the future or back into the The 'grandfatherparadox' is the argument many people use to suggest that time travel is http://www.bbc.co.uk/science/space/exploration/timetravel/index.shtml

CATEGORIES TV RADIO COMMUNICATE ... INDEX SEARCH SATURDAY 12th April 2003 Text only BBC Homepage Science Space home ... Help Like this page? Send it to a friend! Exploration Diary of an Astronaut Future Spaceflight ... Time Travel TIME TRAVEL Shaping the Future by Neil Johnson The idea of travelling forward into the future or back into the past has always fascinated science fiction writers. The 'grandfather paradox' is the argument many people use to suggest that time travel is impossible. What if you went back in time and prevented your grandfather from meeting your grandmother so that your mother was never born? Then you would never have been born... and so on. Until very recently such arguments led most scientists to believe that time travel could never exist outside science fiction. But amazingly, some interpretations of the weirdness of the quantum world now suggest that time travel is possible - at least in theory. Gravity and black holes Einstein's theory of relativity brought space and time together in a single, four-dimensional arrangement that he called spacetime. We know that we can travel forwards, backwards and sideways in space, so why not forwards and backwards in time? Four dimensions are difficult to imagine, so physicists usually suggest you think of spacetime as a rubber sheet stretched out flat. If there are no large masses around, the sheet stays flat, and so any object placed on it will move around in straight lines. But a large mass, such as the

43. Into The Past travelling backward in time Follows the Same principle as travelling forward intime. past the light barrier, we would go faster and faster back in time. http://www.geocities.com/alpheusc/Info1.html

INTO THE PAST!!! To solve the problem of universe aging, we must create the time machine so that it is capable of travelling backwards in time. Travelling backward in time Follows the Same principle as travelling forward in time. The machine would just have to do a little more. The machine would have to go past the light barrier in a dimenion where time goes backwards. That means inorder to travel backward in time, we would first having to travel forward in time for a while first, then once we travel past the light barrier, we would go faster and faster back in time. So now if we're going to travel to a planet a billion light years away. We would have to take one year to accelerate and past the speed of light. The machine would gradually further and further back in time. With more and more usage of this techonology, we then would be able to calculate the time it would be once we get there. If you just want to travel back in time in earth, you would just have to do a big loop and back to earth. To get the exact era of which you desire to travel, once again we would have to carefully calculate how big of a loop we should do and how much faster pass the light barrier we should go. There are many problems that we could possibly run into in the process of Time Travel. To find out more, please read on! READ ON TO FIND OUT MORE!!

44. Obstacles Of Time Travel you went to get a sex change, an went back in time By the time when teenagers likeme are 80 years old, we could very well be travelling by teleporting http://www.geocities.com/alpheusc/info2.html

OBSTACLES OF TIME TRAVEL To make time travel possible, we must over come many obstacles. Such as insufficient energy, and paradoxes. ENERGY INSUFFICIENCY To go on a long voyage like that at the speed of light, it would take an enormous amount of energy. Just by using all of earths energy source, it would still not be enough to use the time machine. A solution to this problem is to use an exterior source of energy that is produced by nature. To get enough energy, we much some how use the immense amount of the blackhole's gravitational energy, or to somehow artificially generate a blackhole. The blackhole would then use the powerful gravitational energy of the blackhole to generate a wormhole. In the early 1930's, Albert Einstein discovered the black hole, he believed that it should be bottomless and lead to other far away place in the universe of time. A black hole like that would bent space and time, making it possible for time travel. Controlling where and when you want to go might be a problem because wromholes are highly unstable. PARADOXES Conclusion Thank you for visiting my site and let me teach you these information. If you have any questions or if you want to learn more, email me or visit my links in the Reference Section.

45. Taking The Cosmic Shortcut - ABC Science Online The future, Einstein's special theory of relativity, the past, theory of gravitation, black holes, Category Science Physics Relativity time Travel...... A blackhole-powered jet of sub-atomic particles travelling at nearly walked in thecorrect direction, you could walk back through time - maybe even http://www.abc.net.au/science/slab/wormholes/default.htm

This article originally appeared in the February 2002 edition of Helix Imagine seeing the dinosaurs first-hand, visiting your great, great, great grandchildren in the 22nd Century, or travelling to the other side of the Milky Way in an instant. Time travel and wormholes used to belong to the realm of make-believe. But, with a little inspiration from some creative writers and thinkers, Elizabeth Warnes says physicists have begun to show us that science fact can be just as strange as science fiction. Travelling into the future... ONLINE FORUM Dr Charley Lineweaver, Professor Ray Norris, Dr Joss Hawthorne and Tamara Davis online to discuss the possibilities and paradoxes of time travel and wormholes You can read what they had to say here Einstein's special theory of relativity shows that time travel into the future is possible. The theory demonstrates that the way we perceive time is relative to our motion. Objects travelling at speeds close to the speed of light (about 300 000 kilometres per second) age more slowly than stationary objects. In 1975, Professor Carrol Alley tested Einstein's theory using two synchronised atomic clocks. Carol loaded one clock onto a plane, which was flown for several hours, while the other clock remained on the ground. At the end of its flight, the clock on the plane was slightly behind the one on the ground. Time had actually slowed down for the clock on the plane. It had travelled forward in time.

46. NRICH Mathematics Enrichment Club (3712.html) in the original (unchanged) universe (between the point in time traveller wantsto travel back to, and the time he leaves to go time travelling) since you http://www.nrich.maths.org.uk/askedNRICH/edited/3712.html

Asked NRICH NRICH Prime NRICH Club ... Get Printable Page April 03 Magazine Site Update News Events Problems Solutions ... Games Archive Problems Solutions Articles Inspirations ... Interactivities Web board Ask NRICH Asked NRICH NRICH Club Register Tough Nuts About Help! ... Where is NRICH? Associated Projects Maths Thesaurus MOTIVATE EuroMaths Millennium Maths ... Project Display maths using fonts images Help Back Issues Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Bernard's Bag(P) - solutions(P) Penta Probs(P) - solutions(P) Let Me Try(P) - solutions(P) Kid's Mag(P) Play Games(P) Staff Room(P) 6 Problems - solutions 15+Challenges - solutions Articles Games LOGOland Editorial News Time Travel By Luqman Bajwa on Wednesday, February 20, 2002 - 01:41 am: Do physicists actually believe time travel is actually possible. I've seen this website which is convinced it is possible: http://freespace.virgin.net/steve.preston/Time.html Personally I think it's impossible, what would happen if someone were to go back in time and kill his parents for example. Any thoughts?

47. Art Of James F. Justin Collection, Entrance Eventually he would be travelling from coast to coast he would begin painting frequently,filling time once spent an excursion in itself, bringing back to life http://members.aol.com/jfjustin/JFJcollection.html

Art Artists Painting Watercolors Pastels Pencil Pen Oils Acrylics Art Gallery James F. Justin Collection Entrance Jim always was fond of drawing, though never trained in art. Later in life he would begin painting frequently, filling time once spent on the road. Yet each painting was an excursion in itself, bringing back to life a memory of a place seen in some recent travel, or some scene of life recalled. Yet Jim's work is more than just a rendition of what was seen but holds more. Each, with vibrant color portrays the feeling of the scene, of its vivaciousness. This exuberance never left Jim, and it remains today in his works. Each is a piece of the color of the great country Jim travelled through and the times he lived. Jim's works are divided into rooms containing pictures grouped by subject themes. Within each room will be thumbnails of pictures in the group which in turn will lead to larger images of each painting. To visit a room, click on the image before it below. Also please check back as Jim painted many works and more will be added as they are digitalized. I hope you will enjoy Jim's paintings as much as Jim enjoyed painting them. California Room - A series of landscapes Cape May Room - A series of seascapes Red Bank Room - A series of maritime paintings Sanctuary Room - A number of avian paintings And More Rooms To Come!!

48. Is Time Travel Possible? Black holes, spacetime continuum, paradoxes, quantum theory, alternative universes and suspended animation.Category Science Physics Relativity time Travel...... the paradox problem, you could still go back in time the world would be in 100 yearstime this method travelling into the future would be far more acceptable http://www.thekeyboard.org.uk/Is time travel possible

Is time travel possible? There are many theories on the possibility of time travel and I could not possibly go into them all. Instead I will try and keep it simple. Not an easy task. A look back in time. The 'Crab' Nebula. First, lets take look at what we know, or more accurately, what we think we know, Black holes, according to relativity theory, warp spacetime with their enormously powerful gravitation field. The effect of this gravitational field is that if an astronaut were to cross the event horizon of a black hole time would slow down on board his spacecraft as he approached the singularity and eventually come to a stop. See What is Time? Similarly time slows down in proportion to speed, the faster our astronaut travels the slower time runs. The closer the astronaut travels to the speed of light the more time slows, until at the speed of light, time would stop. All of which illustrates that time is not a fixed constant, it is affected by gravitational fields and relative speed in the same manner as the other three dimensions of space, the collective dimensions of space and time being referred to as the space-time continuum. The solutions to particular equations of the Special Theory of Relativity can be expressed mathematically in any direction of time without running into any problems with infinities, which can often be the stumbling block for many pure mathematicians. Does this mean that time travel is possible? There is nothing in relativity that rules out time travel, it would appear to be theoretically possible, but I refer back to my earlier question, where are these time travellers?

49. Getting In A Twist Over Time Wormhole, negative energy, Einstein, gravitational field equation, closed timelike loops, cosmic Category Science Physics Relativity time Travel...... The most notorious is the idea of travelling back to the time before your parentswere born and killing your grandparents, making it impossible that you would http://www.spacedaily.com/news/timetravel-01a.html

TECH SPACE Getting In A Twist Over Time A professor of theoretical physics at Connecticut University, believes he has found a route to the past that uses something much more down to earth: light. by Michael Brooks London - May 19, 2001 Ronald Mallett thinks he has found a practical way to make a time machine. Mallett isn't mad. None of the known laws of physics forbids time travel, and in theory, shunting matter back and forth through time shouldn't be that difficult. The catch usually comes when you try to make it work in practice. Remember wormholes, those clever little tunnels in space and time that can supposedly be used to travel from one moment to another? On paper, they're a perfectly respectable way to travel back in time. Trouble is, you need a supply of exotic "negative energy" matter to prise your wormhole open. But Mallett, a professor of theoretical physics at Connecticut University, believes he has found a route to the past that uses something much more down to earth: light. Mallett has worked out that a circulating beam of light, slowed to a snail's pace, just might be the vital ingredient for time travel. Not only is the technology within our grasp, Mallett has teamed up with other scientists at Connecticut to work towards building it. "With this device," he says, "time travel may become a practical possibility."

50. Time Travel For Beginners of theoretical time machines, which involve travelling through black of relativity,of spacetimes which loop back upon themselves in time, but in http://www.biols.susx.ac.uk/home/John_Gribbin/timetrav.htm

Time and the Universe How to build a time machine A beginner's guide Ruling time travel in ... Back to John Gribbin's Home Page Quantum time waits for no cosmos THE INTRIGUING notion that time might run backwards when the Universe collapses has run into difficulties. Raymond Laflamme, of the Los Alamos National Laboratory in New Mexico, has carried out a new calculation which suggests that the Universe cannot start out uniform, go through a cycle of expansion and collapse, and end up in a uniform state. It could start out disordered, expand, and then collapse back into disorder. But, since the COBE data show that our Universe was born in a smooth and uniform state, this symmetric possibility cannot be applied to the real Universe. Physicists have long puzzled over the fact that two distinct "arrows of time" both point in the same direction. In the everyday world, things wear out cups fall from tables and break, but broken cups never re- assemble themselves spontaneously. In the expanding Universe at large, the future is the direction of time in which galaxies are further apart. Many years ago, Thomas Gold suggested that these two arrows might be linked. That would mean that if and when the expansion of the Universe were to reverse, then the everyday arrow of time would also reverse, with broken cups re-assembling themselves.

51. Travelling Asia 1987-88 *** Yangshuo, Village At Li River *** Photo's And Storie down the main street, that is filled at that time with souvenirstalls and anythingelse sellable to tourists, to the buses that will bring them back to Guilin. http://home.wanadoo.nl/around-the-world/azie8788/aztx041.htm

Click the items below to open a small extra window with more about 19 - 24 October 1987 Yangshuo - village at the Li river In Guilin, famous because of its fantastic limestonehills along the river Li, we get on the bus, after a day and a half in the train, to the village of Yangshuo which is 80 km to the south. The "tourgroup-tourists" go to Guilin where the real hotels are to be found, the place for backpack-tourists is Yangshuo.At some time during their visit the tourgroup-tourists will visit Yangshuo as well: the tourboats from Guilin that go down the river Li everyday for the magnificent views, end up in Yangshuo at about three o'clock. The tourists walk down the main street, that is filled at that time with souvenirstalls and anything else sellable to tourists, to the buses that will bring them back to Guilin. After an hour the main street is quiet again, and Yangshuo once again seems a sleepy Chinese village. Seems, because at the time we arrive Yangshuo already has a reputation as being the place for backpacktravellers in China.

52. TIME-2002 - Home They can find out how people spent their free time over the last 200 years at thePumphouse People's Museum, or go back in time even further at the Manchester http://www.cs.man.ac.uk/img/TIME-2002/travelling.html

9th International Symposium on TEMPORAL REPRESENTATION AND REASONING (TIME-2002) Manchester, UK 7-9 July, 2002 SYMPOSIUM LOCATION The symposium will take place in Manchester - the liveliest of cities with its exciting, cosmopolitan atmosphere , offering you lots to see and do during your visit. Along with top attractions, galleries, museums, superb shopping and stunning Victorian Architecture, Manchester is everybody's kind of city. Manchester is an outward looking European City, with the warmth and atmosphere of a village; it contains a range of village areas each with its own unique identity and special qualities. It is Manchester's Castlefield area that perhaps best captures the city's rich layers of history. Castlefield was home to the Romans for 400 years from 79 AD. Medieval Manchester grew around the Cathedral area, while Castlefield became a deer park, transforming during the mid 1700's into the centre of the Industrial Revolution. Industry grew rapidly after the Bridgewater Canal opened in 1761, bringing coal into the city to heat the mills. Above all, the construction of the Manchester Ship canal made Manchester a major world port and trading centre. The city's rich merchants, built palatial warehouses as symbols of their success and today, Manchester has preserved many of its fine Victorian buildings, and given them a new lease if life as striking hotels, new homes and offices. The Town Hall, designed by Waterhouse, with its famous display of Ford Madox Brown murals, and what is now the Palace Hotel are among the city's finest buildings.

53. Untitled By travelling superlight, or more correctly on the other side of thelight barrier, we can arrange to arrive back here at any time. http://freespace.virgin.net/steve.preston/time2.html

And there are even more catches !!! The second problem of time dilation means that when we return from our trip to Andromeda we would have aged less than 4 years while the Earth has aged around 4.4 million years. One or two changes would have undoubtedly taken place back here on Earth! This would seem to be an insurmountable drawback, and one which will be discussed at some length later. The idea of travelling from world to world, having strange and exotic adventures with even more strange and exotic creatures, and then dropping back later for the odd chat about old times, is just not on. The old times would be just too old for those left behind to survive the wait! The galaxy is, after all, about 80,000 light years across, and this immediately converts to a minimum travel time of 160,000 Earth years. So travel as we know it is just not possible. Sailing off across the depths of space on five-year missions is all very well, but whose five years? Obviously sub-light travel puts severe restrictions on what we can reasonably expect to do. But what of travel at speeds faster than light? Faster than light travel offers the hope of a way around these temporal limitations. It is the mechanism by which we can re-establish the absolute time that approximates so well here on Earth. As a literary device there is nothing at all wrong with faster than light travel, but as an accurate depiction of life in an intergalactic culture there are some problems. It is a shame to dispel these illusions, but the universe is as it is. So that about wraps it up for faster than light travel or does it?

54. Tom Griffiths: "Travelling In Deep Time: _La Longue Duree_ In Australian History travelling in Deep timeLa Longue Duréein Australian History. in world historywhen we cast our minds back over the meaning of intervals of time of a http://www.lib.latrobe.edu.au/AHR/archive/Issue-June-2000/griffiths4.html

Travelling in Deep Time: in Australian History Tom Griffiths Paul Gillen has responded to this essay. really Throughout his life, the French historian Fernand Braudel championed the multiplicity of time, and the need for historians to look beyond 'social time' or the history of events, in order to embrace The Mediterranean In the half-century since Braudel wrote in this way, his has lengthened beyond his dreams as the Darwinian revolution has continued to unfold and scientists have elicited histories of 'the earth itself, life on earth, and even the universe'. The best book on time in Australia is The Unforgiving Minute: How Australians Learnt to Tell the Time The book grows out of Davison's profound interest in the routines and rhythms of urban society, the domestic arithmetic of material life, the invisible architecture of the city; it builds satisfyingly on his superb essay on 'Energy' published in a volume of the bicentennial history of Australia, Australians 1888.

55. Eye - Goin' Down On The Road - 09.02.99 The West Coast brand of hustler remains remarkably untouched by time, with their It'slike travelling back to a period of history when pornography was a public http://www.eye.net/eye/issue/issue_09.02.99/columns/feelings.html

CONTENTS Latest issue This issue LISTINGS Movie showtimes Music listings Theatre Dance ... Etc. COLUMNS Love Bites Feelings Pink Panther Sign Language ... ABOUT EYE eye - FEELINGS Goin' down on the road BY BRUCE LABRUCE It's time once again to talk some trash in a good way, of course about Vancouver. Having recently visited our western sister city for the Gay and One Woman Going Down on Each Other Film Festival, I'm reminded of how most Torontonians seem to love the beautiful, scenic Vancouver while the majority of Vancouverites have a distinct distaste for the vulgar, aggressive Toronto not unlike the sordid, dysfunctional relationship between L.A. and San Francisco. Ironically, the thing I like most about Vancouver is the aspects of it which recall the Toronto of the '70s that unique brand of Canadian sleaze I have encountered nowhere else in the world. Vancouver today remains very much like the Toronto of the 1970 Don Shebib classic, Goin' Down the Road , one of my all-time favourite Canadian films trashy, provincial and wonderfully depressing. I'm staying at the Ramada, a block away from crack central, the oxymoronically monikered Victory Park. Pigeon Park the other, more appropriately titled crack and heroin hangout is only a short jaunt in the other direction. Running parallel, one street over, is Hastings, the shopping district which at night transforms, Jekyll and Hyde-style, into a gauntlet of seedy drug types.

56. The Richmond Review, Book Review, Time Travel In Einstein's Universe By J Richar you to go to a certain hotel and look at the guestlist for 1921; you look and findboth her name and yours; you get in a time machine, travelling back to 1921 http://www.richmondreview.co.uk/books/timetravel.html

book review WHAT'S NEW LIBRARY FEATURES REVIEWS ... book reviews : Time Travel In Einstein's Universe by J Richard Gott Time Travel In Einstein's Universe J Richard Gott Time Travel In Einstein's Universe J Richard Gott Weidenfeld London 2001 Merchandise Links Amazon.co.uk If I only put my hand in a time machine and pulled the switch, what would happen to my hand? Would I bleed? Would it still be there, but a parallel universe open up where my disembodied hand would exist Thing? Would there be a black hole in space and time where my hand used to be? Gott doesn't answer this most troubling of questions. Perplexing. Nowhere is the connection between the apparent polarities of art and science stronger than between Science Fiction and Physics. In the literary genre, Physics achieves mythical proportions, in Physics, the genre finds both teacher and devotee. More than this, as Gott makes clear in the opening chapters of this book, Sci-fi is often the inspiration for many advances in physics. This is, generally, a finely crafted book, which details the understanding of time travel through the years from the perspective of a major physicist. Lucid, yet with a few stylistic ticks (which I'll come to), this book will act as go-between for those of us who need an introduction to these complex theories. Fascinating.

57. Orca Springer Goes Home - Update of the progression of the whales as they headed “out” a short time earlier thewhole of that day the next in the Strait, casually travelling back forth http://www.bornfree.org.uk/dolphin/dolphnews028.htm

NEWS PROJECTS EDUCATION GET INVOLVED ... EXTRAS Springer Update - Looking Good Paul Spong Springer update Dolphin Campaign News NEWS ... Contact Born Free

58. HIT DVD | DVD Price Compare - Back To The Future - The Complete Trilogy (Full Sc BTTF Part 2 takes the mindbending back-and-forth through time thing even trying tosave Marty's son from Biff's son Griff, which much ensuing time-travelling. http://www.hitdvd.net/dvdinfo/1622?reviews=1

59. Travelling With Cats kitty. About travelling With Kitty Basic tips for travelling with yourcat to guarantee you'll both be welcome back, next time. Top http://cats.about.com/cs/travelwithcats/

zfp=-1 About Cats Search in this topic on About on the Web in Products Web Hosting Cats with Franny Syufy Your Guide to one of hundreds of sites Home Articles Forums ... Help zmhp('style="color:#fff"') Subjects ESSENTIALS A to Z About Cats A to Z Cat Breeds A-Z Cat Food Brands ... All articles on this topic Stay up-to-date! Subscribe to our newsletter. Advertising Free Credit Report Free Psychics Advertisement Travelling with Cats Guide picks There are times (cat shows, moving) that you will find it necessary to travel with your cat. These resources help turn a traumatic experience into one that is at least bearable, for both you and your kitty. About Travelling With Kitty Basic tips for travelling with your cat to guarantee you'll both be welcome back, next time. Top 6 Ways to Ease Travel with Cats Travel with cats does not have to be a disaster. Cats travel well if conditioned to it in advance of long trips. These tips will make travel easier on you and your cat, and will guarantee future invitations for your cat to visit again. Cats in Residence Local Pets Resources for pets in cities and locales all across the United States, from About.com Guides. Great to have if you're travelling to one of these destinations.

60. Ultimate DVD Magazine: Main Page As the films hit DVD, we go back in time to discover the genesis ofthe timetravelling back to the Future and how it became a trilogy . http://www.visimag.com/ultimatedvd/

SEARCH for your own topics Readers in USA click here Elsewhere click here Image SUBSCRIBE and save up to 25% UK/World USA $ Latest update: February 6, 2003 Current selections: X-Men 1.5 Watch out for Great Scott! Back to the Future and how it became a trilogy MORE FEATURES FROM RECENT ISSUES... Spider-Man Phone the Producer Ultimate DVD phones the home of E.T. DVD producer Laurent Bouzereau to find out about the new release with its amazing extras Star Wars Exclusive Review Exclusive taster of our review of the new Star Wars movie Attack of the Clones . We look at the film, and then cover the masses of extras Big Brother is Coming The Scorpion King The Mummy Returns comes the tale of The Scorpion King. Director Chuck Russell and star 'The Rock' fill us in One Ring to Bind Them All The Lord of the Rings has hit the cinemas, and that's coming out on DVD. The people behind the film start us on the quest ADDITIONAL NAVIGATION CULT TIMES FILM REVIEW MOVIE IDOLS SHIVERS ... LINKS VI DIRECT US Store UK / World Store Shopping Info Ultimate DVD #39  X-Men 1.5

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