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Old 06-28-2009   #21 (permalink)
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Re: Physicist believes we will travel through time this century

I think the idea of why we haven't been visited can be explained by the more realistic view of a time machine. If I could indeed travel back in time from what I've read the limits of your time machine would be the day it was turned on. Traveling back further than the day it was turned on would be impossible. I've read where at least one scientist seems think it could be done quite easily, at least communication back in time if not actual travel. But again he says the limit of the machine would be to back to the day it was turned on. If we had such a communication device and lets say an earth quake caused a huge tsunami to wash away a major city. The future could send a warning to the past to evacuate the city before the wave hits. How would this be seen from the stand point of causality?


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