In the Season Two episode " White Tulip ", Olivia experiences déjà vu while investigating the apartment of a time traveler who reset the timeline.

The grandfather paradox, for example, would arise if a time traveler were to kill his own grandfather before his mother or father was conceived, thereby preventing his own birth.

The most famous is H. G. Wells's 1895 novel The Time Machine, which uses a vehicle that allows an operator to travel purposefully and selectively, while Twain's time traveler is struck in the head.

The traveler remains in a projectile for one year of his time, and then reverses direction.

Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the need for the traveler to experience the intervening period ( at least not at the normal rate ).

The Ekumen stories tell of the efforts to re-establish a civilization on a galactic scale through NAFAL ( Nearly As Fast As Light ) interstellar travel taking years to travel between stars, although only weeks or months from the viewpoint of the traveler, because of time dilation, and through instantaneous interstellar communication using the ansible.

* The Flipside of Dominick Hide is about a time traveler from 2130 looking for his ancestor in 1980.

Provided that the rescuees were not known to have survived prior to the date that the time traveler stepped into the time machine ( perhaps because they were taken forward in time to a later date, or because their identities were hidden ), the time traveler's motivation to travel back in time and save them will be preserved.

* In " Via the Time Accelerator " by F. J. Bridge ( a pseudonym of Francis J. Brueckel ), from the January 1931 issue of Amazing Stories, a time traveler in 1930 wonders if he should travel to the future, and then he sees himself returning from the future, which reassures him about the success of his voyage.

in working with these patients the therapist eventually gets to do some at least private mulling over of the possible meaning of a belch, or the passage of flatus, not only because he is reduced to this for lack of anything else to analyze, but also because he learns that even these animal-like sounds constitute forms of communication in which, from time to time, quite different things are being said, long before the patient can become sufficiently aware of these, as distinct feelings and concepts, to say them in words.

In time bishops came to be appointed locally rather than from England and eventually national synods began to pass ecclesiastical legislation independent of England.

These rituals and beliefs eventually evolved over time into the vast array of “ developed ” religions.

Maria Comnena had borne Amalric two daughters: Isabella, who would eventually marry four husbands in turn and succeed as queen, was born in 1172 ; and a stillborn child some time later.

Each time that n reaches zero, m decreases, so m eventually reaches zero as well.

The two towns over time formed close economic and social ties and eventually merged in 1307 and came to be known as Berlin.

Slobodan Milošević, the President of Yugoslavia at the time, was eventually charged with the " murders of about 600 individually identified ethnic Albanians " and " crimes against humanity.

Private email ( Netmail ), public message boards ( Echomail ) and eventually even file attachments on a FidoNet-capable BBS would be bundled into one or more archive files over a set time interval.

The idea that one butterfly could eventually have a far-reaching ripple effect on subsequent historic events first appears in " A Sound of Thunder ", a 1952 short story by Ray Bradbury about time travel ( see Literature and print here ).

By the time dBASE for Windows eventually shipped, the developer community had moved on to other products such as Clipper or FoxBase and dBASE never regained significant share of Ashton-Tate's former market.

In a cabled system, the cables need to be flexed every time that a card is added or removed from the system ; this flexing eventually causes mechanical failures.

The merchants with whom they were travelling, defended themselves vigorously and for a time successfully, but eventually they were conquered and overcome by the pirates, who took from them their ships and all that they possessed, whilst they themselves barely escaped on.

The Red Army was able to regroup far to the rear of the main battle line, and eventually defeat the German forces for the first time in the Battle of Moscow.

Such symptoms do gradually lessen over time, eventually disappearing altogether.

Mainframe and minicomputer manufacturers of the time launched proprietary IC development programs to upgrade their older computer architectures, and eventually produced instruction set compatible microprocessors that were backward-compatible with their older hardware and software.

As time progressed, English country dances were spread and reinterpreted throughout the Western world, and eventually the French form of the name came to be associated with the American folk dances, especially in New England ( this Gallicized name change may have followed a contemporary misbelief that the form was originally French ).

The elements of a countable set can be counted one at a time — although the counting may never finish, every element of the set will eventually be associated with a natural number.

Since the time of Pāṇini, at least, linguists have described the grammars of languages in terms of their block structure, and described how sentences are recursively built up from smaller phrases, and eventually individual words or word elements.

Dance instructors at the time eventually generalized these stylistic variations into three rhythmic categories: single, double, and triple shag.

However, by this time the market was in the midst of the first video game crash, and Fairchild eventually threw in the towel and left the market.

In the early 1990s, CBM continued selling Amigas with 7 – 14 MHz 68000-family CPUs ( even though Amiga 3000 with 25 MHz 68030 was in the market by that time ), when PCs with 33 MHz 486s, high-color graphics cards and SoundBlaster ( or compatible ) sound cards offered comparable, and eventually higher, performance, albeit at higher prices.

An IBM-made 386 machine eventually reached the market seven months later, but by that time Compaq was the 386 supplier of choice and IBM had lost its image of technical leadership.

Women embraced disco as well, and the music eventually expanded to several other popular groups of the time.

Though a further version was planned, it never made it out of beta and was eventually canceled due to programmer time constraints.

Godzilla then arrives in Japan and makes short work of King Ghidorah and the UFO, which was teleported by M-11 before it could time warp, killing Wilson and Grenchko.

* 1864 – Emperor Maximilian I of Mexico arrives in Mexico for the first time.

After deactivating it, the Earth Defense Force arrives just in time to save Parker and Eos from a fighter aircraft.

The Enterprise arrives in time to save the crew of the USS Defiant which is being commanded by Lieutenant Commander Worf.

* 1714 – George I arrives in Great Britain for the first time since becoming king on August 1st.

Gawain, for example, has an adventure in the 1973 version which is not a part of the poem between the time he leaves Camelot and the time he arrives at Bertilak's castle.

If, however, the mobile phone is at just less than 35 km from the base station, the time delay will mean the mobile's broadcast arrives at the very end of the time slot.

Harry, who had a change of heart, arrives in time to protect Chris but is fatally shot.

At the same time, a Marine named Coonan arrives in a convoy loaded with high explosives.

* Frederick, Prince of Wales, son of King George II of Great Britain, arrives in Britain for the first time, aged 21.

* Smallpox arrives in Europe for the first time.

* Duarte Barbosa arrives in India for the second time.

The Banu Ghaniya reenforcement arrives just in time from Africa to defeat the Almohads and reassert their domination of the island.

Cut-through switches have to fall back to store and forward if the outgoing port is busy at the time the packet arrives.

However, by the time he arrives, he discovers that George's possessions have been broken into with the help of a local locksmith and that the letters have vanished.

But if we focus on a time interval during which the rate is roughly constant, such as from 2 to 4 p. m. during work days, the exponential distribution can be used as a good approximate model for the time until the next phone call arrives.

Jet fighters and other supersonic aircraft that do not spend a great deal of time supersonic also often use turbofans, but to function, air intake ducting is needed to slow the air down so that when it arrives at the front of the turbofan, it is subsonic.

The ghost, in Michael's body, arrives at Reg's quarters while Dirk and Richard are there, and demands Reg use his time machine to return back 4 billion years in the past.