Right, real time travel.
Most of science is theory haha that doesn't mean anything. I think there might be confusion with what constitutes scientific theory. First off, a scientific law is the description of an observed phenomenon. Scientific theory explains why the phenomenon exists or what causes it. Second, a lot of people think that scientific theories turn into laws, with enough research, but, that isn't the case in science.
"For a real, everyday example of time travel, consider the satellites of the Global Positioning System. Were it not for built-in calibrations, the GPS atomic clocks would gain 38 microseconds over terrestrial timepieces every day, throwing off their location accuracy by several miles. “Clocks on Earth tick a tiny bit slower than satellites out in space,” said Lloyd. The reason: time dilation, as described by Einstein’s two theories of relativity."
http://www.huffingtonpost.com/2012/0...n_1429953.html
"Quantum mechanics has opened up strange avenues as well. Experiments have shown that measuring a particle property at an initial and end stage can modify its middle value, but only if the last measurement takes place. Such clues toward a possible “backwards causality” continue to be investigated." Nobody undertands this
http://www.huffingtonpost.com/2012/0...n_1429953.html
"Lloyd has conducted quantum mechanical experiments in the last few years that suggest timelines remain self-consistent. The tests served as “the moral equivalent of sending a photon a few billionths of a second backwards in time and having it try to kill its former self,” Lloyd said.
"In Lloyd’s experiment, as photons got ever closer to interfering with themselves, the probability of the experiment succeeding grew ever lower. “Our theory has an automatic censorship of things which are completely inconsistent,” said Lloyd. “When you go back [in time], no matter how hard you try, you cannot change the thing you try to change.”
http://www.huffingtonpost.com/2012/0...n_1429953.html
As for discussing Flash, go ahead haha I just didn't figure someone was asking about other types of science fiction.