Some theories, most notably special and general relativity, suggest that suitable geometries of spacetime, or specific types of motion in space, may allow time travel into the past and future if these geometries or motions are possible.[3] Concepts that aid such understanding include the closed timelike curve.

Although the possibility of traveling to the future by moving at relativistic velocities is taken for granted by physicists, many in the scientific community believe that backwards time travel is highly unlikely. Any theory which would allow time travel would require that issues of causality be resolved. What if one were to go back in time and kill one's own grandfather (see grandfather paradox)? Additionally, Stephen Hawking once suggested that the absence of tourists from the future constitutes an argument against the existence of time travel—a variant of the Fermi paradox, with time travelers instead of alien visitors (but Hawking noted elsewhere that time travel may......

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Title: Time Travel
Approximate Word Count: 300
Approximate Pages: 2 (250 words per double-spaced page)

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1. Time Travel
   

   time travel. Time Travel…A Possibility? From ... fiction. The quantum physics
   side of time travel concentrates also on black holes. ... ...

2. Time Travel
   

   Time Travel. Time travel is feat thought by most to be impossible. After all
   time travel is what many science fiction movies are made of. ... ...

3. Time Travel
   

   Time Travel. ... One conclusion, however, is pretty straight forward. Time travel – at
   least the kind that would be of any use to us – is just not possible. ... ...

4. Time Travel
   

   Time Travel. Some theories ... highly unlikely. Any theory which would allow time
   travel would require that issues of causality be resolved. ... ...

5. Time Travel
   

   time travel. Time travel Presented to: Dr. Magd Kahl Presented ... both space
   and time. What is time travel? One standard definition is ... ...