Time Travel

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Across
  1. 3. Time on the Earth goes fast while in the space goes slow.
  2. 5. is the complicated way to prove that time travel is impossible by killing your father’s father
  3. 7. is the thing that we can travel to the past or the future
Down
  1. 1. The way we can travel through time into past or future
  2. 2. The hole in the space which we can travel to the future
  3. 4. The hole in the space that we can travel to the past.
  4. 6. is what we use to measure the clock