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Time travel is the hypothetical activity of traveling into the past or future. Time travel is a concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a device known as a time machine. The idea of a time machine was popularized by H. G. Wells's 1895 novel The Time ...
A bootstrap paradox, also known as an information loop, an information paradox, [6] an ontological paradox, [7] or a "predestination paradox" is a paradox of time travel that occurs when any event, such as an action, information, an object, or a person, ultimately causes itself, as a consequence of either retrocausality or time travel.
A time slip is a plot device in fantasy and science fiction in which a person, or group of people, seem to travel through time by unknown means. [12] [13] The idea of a time slip has been used in 19th century fantasy, an early example being Washington Irving's 1819 Rip Van Winkle, where the mechanism of time travel is an extraordinarily long sleep. [14]
As far as timing goes, travel seems to be easier at certain times of year, seemingly at times related to the changing seasons. Claire first traveled back in time just after the festival of Beltane ...
Killing baby Hitler is a thought experiment in ethics and theoretical physics which poses the question of using time travel to assassinate an infant Adolf Hitler. It presents an ethical dilemma in both the action and its consequences, as well as a temporal paradox in the logical consistency of time.
Time Travelers Never Die, written by Jack McDevitt, is a 2009 science fiction book about time travel and the consequences it can cause. The novel is a reworking of McDevitt's 1996 novella of the same title, which in 1997 was nominated for both a Hugo Award and a Nebula Award. McDevitt rewrote the story because he was inspired to work with time ...
In the year 2055, time travel has become a practical reality, and the company Time Safari Inc. offers wealthy adventurers the chance to travel back in time to hunt extinct species such as dinosaurs. A hunter named Eckels pays $10,000 to join a hunting party that will travel back 65 million years to the Late Cretaceous period, on a guided safari ...
A time travel project probe from the year 2073 is sent to the year 1973 and goes wrong, creating a plague-ravaged, alternate timeline whose inhabitants are locked in a constant battle with killer robots. The hero must find a similar time machine in this alternate world and prevent the disaster from ever happening. 1994 Star Trek Generations