1. TIME TRAVEL!
Mr. Sroka

2. Overview Introduction Theories Paradoxes Research
References in Fiction
Conclusions
References

3. Introduction

4. What is Time Travel?
A concept in which time is traversed in much the same way that space is traversed.
Possibly between parallel realities and universes
Once confined to fantasy and science fiction, time travel is now “simply” an engineering problem.

5. Theories

6. Time Dilation Permitted by Special Theory of Relativity.
Time appears to pass more slowly for faster moving bodies.
Gives rise to Twin Paradox
Preserves causality as only forward travel is possible

7. Wormholes Hypothetical topological feature of spacetime.
Essentially a ‘shortcut’ through space and time.
Analagous to a worm burrowing through an apple rather than travelling around the surface.

9. Tipler Cylinder
Hypothetical object theorized by Frank J. Tipler in 1974.
Sufficiently long cylinder with mass of several neutron stars.
Induced to spin at near speed of light rotation rate.
Creates frame dragging effect, warping spacetime in its locality.
Travel limited to times in which cylinder already exists.

10. Black holes
Another possibility would be to move a ship rapidly around a black hole

11. Cosmic Strings Cosmic strings wrap space and time around themselves.
In theory making time travel possible

12. Flux Capacitor Conceived on November 5, 1955 by Dr. Emit Brown.
Requires speeds in excess of 88 MPH.
Energy requirements of 1.21 JigoWatts.
Stainless steel mounting assists in flux dispersion.

13. Paradoxes

14. Grandfather Paradox PARADOX!!!!!!1
Often used to argue that backwards time travel is not possible
You travel back in time and kill your biological grandfather before he met your grandmother.
One of our parents, and thus you, would never have been conceived.
It is therefore impossible for you to have traveled back in time to kill your grandfather.
Therefore your grandfather would have lived to conceive your parent, who would have conceived you.
PARADOX!!!!!!1

15. Exoplanets
Exoplanets are planets that orbit other stars besides our sun.
Over 4000 have been found only a select few have the characteristics for life

16. Goldilocks principal