Stories like Rip Van Winkle (1819) or Edward Bellamy’s Looking Backward (1888) used long slumbers to "travel" to the future.
An object or information is sent back in time, becoming the cause of itself (e.g., a time traveler giving Shakespeare his own plays).
Theoretical "bridges" through space-time (Einstein-Rosen bridges) that could technically connect two different points in time. 3. The Paradoxes
Explores the "multiverse" or branching timelines ( Avengers: Endgame , Dark ), suggesting that changing the past simply creates a new reality rather than erasing the old one. 5. The 2018 Documentary
"A Brief History of Time Travel" can refer to two things: the evolution of the concept in science and literature, or the 2018 documentary of the same name. Since the documentary is a popular deep-dive into both, 1. The Literary Origins
If you go back and prevent your grandfather from meeting your grandmother, you are never born—so you can’t go back to stop them.
