time travel is already a reality. My old physics lecturer told me that a young guy had the whole physics world up in arms because he stated that time travel is already happening in space,. Since there is no measurement of time in a vacuum,then all who go into space are time travellers, as time is continuing on earth.
"if we fight for money,I'll stop hitting you when you ask me to. If we fight for honour,I'll stop hitting you when I feel like it" Royce Gracie