Time Travel

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Across
  1. 2. Scientist that came up with the theory of time being relative
  2. 3. Time is in this dimension and provides "direction"
  3. 4. Time Dilation is possible through _____________
  4. 6. Parallel universe time travel that doesn't change the original timeline
Down
  1. 1. The future left cannot be changed, but is fixed
  2. 5. Realistic Time Travel when you jump these to get to another spot on the Earth
  3. 7. Time is __________, not constant