Faster-than-light communication
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Why does FTL imply that BACKWARDS time travel is possible?
Spacetime diagram (interctive)
Why would FTL imply time travel
Novikov self-consistency principle
How, in practice, could instantaneous signalling violate causality?
What do spacelike, timelike and lightlike spacetime interval really mean?
Krasnikov tube
Faster than light travel
Sharp Blue: Relativity, FTL and causality
Faster-than-light communication
Visualisation: Minkowski diagrams
Paradoxes and FTL Communication
Can you really go back in time by breaking the speed of light?
How does instantaneous communication violate causality?
Why FTL implies time travel
Things you should know about databases