Tag Info

New answers tagged


The article almost certainly refers to the hypothetical Alcubierre drive. Jerry is quite correct to say that the drive requires exotic matter, and that we have never observed any exotic matter and that if exotic matter existed it would cause all sorts of problems including closed timelike curves. However exotic matter is theoretically possible in the sense ...


False. These devices require a type of matter that has not been shown to exist, and would become a time machine if they did exist -- I could use it to send signals into the past.


As I understand it, the space is not actually moving, but expanding; Which means that objects in this space are "moving apart". Now, "moving apart" has not much to do with the physical term of moving. Essentially, one does not move space because that makes no sense; Not because it is impossible. (Or, more poetically: It is not even impossible to move ...

Top 50 recent answers are included