2. Concept of Time Travel
Time travel to Past
Time travel to Future
Paradoxes
The “Grandfather Paradox”
Stephen Hawking’s Paradox
Some discussion on Ronalt Mallett’s Time Machine
6. Going back
in Time
Chapman kills his
grandfather
Chapman’s
parents are
not born
Even
Chapman is
not born
So he didn’t
kill his
grandfather
??????
7. Novikov’s Self-Consistency principle
• Contradictory causal loops cannot form, but those
consistent ones can.
Parallel Universes
• Multiple version of future exist in parallel universes.
8. Why don't we observe tourists, souvenir hunters,
historians, archaeologists, Criminals visiting us
from future?
Global warming, Nuclear war, Super Viruses or
The Robotic Uprising killed all human