Time travel

Time travel is a plot device which has become a recognized staple of science fiction and fantasy. It involves sending people and/or objects from one time to another. No analog of time travel has ever been known to exist in documented reality.

Time travel in Crosstime Traffic
Although Galbraith and Hester invented travel between alternate present days in the mid 21st century, travel back and forth in time remained eternally elusive from science.

Time travel in "Death in Vesunna"
The Time Patrol was the official arbiter of time travel, but outlaw commerce also existed.

Time travel in The Guns of the South
Time travel was possible by 2014 in the original timeline whence the "Rivington Men" of "America Will Break" (a division of Afrikaner Weerstandsbeweging) originated. In that year they stole a machine and imported men and materiels to alter the course of the American Civil War.

The Rivington Men succeeded in creating a Confederate victory in the "Second American Revolution". However, they were unable to maintain their hold on the government in the post war years and rebelled. In the government's hunting down of the terrorists, all of the AWB men were killed or captured, and their time machine was destroyed in the battle.

Time travel in "Hatching Season"
Time travel was commonly used to study animals of the Mesozoic Era.

Time travel in "Hindsight"
Michelle Gordian traveled from 1988 to 1949 to save America from its dark history in the intervening decades of the original timeline. By 1953, she had popularized several true stories of her world's 1960s and '70s in the form of pulp fiction, but history as a whole had not yet shown any appreciable signs of change.

Time travel in Justin Kloster Stories
Justin Kloster invented time travel in 2018 based on the theory of superstrings.

Time travel in "Lure"
Time travel made the San Diego Cenozoic Zoo possible.

Time travel in "We Haven't Got There Yet"
An unknown force sent a troupe of actors performing on London's stages from 2066 to 1606.