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What at first seemed impossible is shown by this book to actually be impossible, just like you thought it was. Everywhere there appears to be a possibility of sending messages faster than light, the laws of the universe step in to make certain such a thing will not happen. Sending such superluminal messages would necessarily, according to special relativity, also allow sending messages into the past, and the universe, apparently, doesn't like that idea and has strictly prohibited it. Time travel...
I read read about 95% of this book about 5+ years ago. Then it sat on the shelf for 5+ years for some reason. I finally finished it yesterday.I definitely read it at a sub-luminal pace :-) Superluminal communication, superluminal travel, time travel? We're not there yet ,,,
The information in this book is mind-blowing ! I will definitely read it again and again.
Probably my favorite book growing up, albeit a bit outdated now. Still, simple explanations and perfect at sparking imagination and wonder.