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For other articles with similar titles, see Time Stream (disambiguation)
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- Streams only flow one way. Time only moves forward.
- Streams flow constantly. Time never stops.
- People can stand in a stream, but will be pulled along by it. People exist within time, but move with it.
- Some physicists and science fiction writers have speculated that time is branching--it branches into alternate universes (see many-worlds interpretation). Streams can also diverge.
In fiction, an alternate continuity is sometimes called an alternate timestream.
Examples of the usage of timestream:
- In DC Comics, the timestream is an invisible current that flows through the DC Universe. It is used as a way for heroes like the Linear Men, and especially Waverider, to travel and correct time fluctuations from time traveling supervillains who seek to alter the correct reality. The timestream was mainly used by Waverider during Armageddon 2001, Death of Superman, and Zero Hour events. The timestream is connected to the Speed Force, so speedsters are able to tap into certain points in it in order to time travel. It is possible Per Degaton, Chronos, Vandal Savage, Hourman, Max Mercury, Savitar and Epoch, has also used the same type of time stream for time travel.
- In the Legacy of Kain game series, the timestream's nature (as to whether or not it can be changed) plays a vital role throughout the story.
- In the Terra Nova (TV series), the Terra Nova settlement exists in a different timestream, so that it doesn't affect the future of 2149, from where the settlers arrive. To decide upon where (and where) to start the settlement, a timeprobe is sent out from 2149 and when it can't be traced back anywhere on Earth, they sense that it reached a different time-stream and begin the settlement in that timestream.