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  2. List of school massacres by death toll - Wikipedia

    en.wikipedia.org/wiki/List_of_school_massacres...

    The # symbol indicates the massacre's ranking by number of deaths (since this list is sorted by death toll, not by date or by number of overall casualties).. The W column gives a basic description of the weapons used:

  3. Temporal paradox - Wikipedia

    en.wikipedia.org/wiki/Temporal_paradox

    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. [8] [9 ...

  4. Time travel - Wikipedia

    en.wikipedia.org/wiki/Time_travel

    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 ...

  5. Lists of school-related attacks - Wikipedia

    en.wikipedia.org/wiki/Lists_of_school-related...

    List of rampage killers, includes incidents that involved only staff who work at the school; List of school massacres by death toll; List of school shootings in Brazil; List of school shootings in Russia; Lists of school shootings in the United States

  6. Quantum mechanics of time travel - Wikipedia

    en.wikipedia.org/wiki/Quantum_mechanics_of_time...

    The theoretical study of time travel generally follows the laws of general relativity. Quantum mechanics requires physicists to solve equations describing how probabilities behave along closed timelike curves (CTCs), which are theoretical loops in spacetime that might make it possible to travel through time. [1] [2] [3] [4]

  7. School shootings in the US: Fast facts

    www.aol.com/school-shootings-us-fast-facts...

    There have been at least 83 school shootings in the United States so far this year, as of December 16. Twenty-seven were on college campuses, and 56 were on K-12 school grounds. The incidents left ...

  8. Novikov self-consistency principle - Wikipedia

    en.wikipedia.org/wiki/Novikov_self-consistency...

    Outer Wilds (2019): A video game involving time travel which does not follow the principle, causing a game over if the player experiments to test it. All time travel in the Hallmark Channel original series The Way Home follows the Novikov self-consistency principle. Two of the main characters can travel backwards in time by jumping into a pond ...

  9. School shooting - Wikipedia

    en.wikipedia.org/wiki/School_shooting

    Vladislav Roslyakov killed 20 people with a shotgun in the Kerch Polytechnic College massacre. A school shooting is an armed attack at an educational institution, such as a primary school, secondary school, high school or university, involving the use of a firearm. Many school shootings are also categorized as mass shootings due to multiple casualties. The phenomenon is most widespread in the ...