For me time travel was never a possibility but now a Chinese scientist is reporting he has proven it is not possible. Here is an excerpt.
Sorry Doc, Scientists Say Time Travel Is Impossible
Article found here. http://www.pcmag.com/article2/0,2817,2389132,00.asp
Dashing the hopes of “Back to the Future” and “Bill and Ted” fans alike, a group of Hong Kong scientists claims that recent research proves that time travel is impossible.
A team at the Hong Kong University of Science and Technology, led by Professor Shengwang Du, has concluded that single photons cannot travel faster than the speed of light in a vacuum. Unfortunately for time travel buffs, photons apparently obey the laws of physics, regardless of whether you have a magic phone booth or can get that DeLorean up to 88 miles per hour.
“The results add to our understanding of how a single photon moves. They also confirm the upper bound on how fast information travels with light,” Professor Du said in a statement. “By showing that single photons cannot travel faster than the speed of light, our results bring a closure to the debate on the true speed of information carried by a single photon. Our findings will also likely have potential applications by giving scientists a better picture on the transmission of quantum information.”
According to Du, the scientific community got all excited about time travel several years ago with the discovery of “superluminal propagation of optical pulses,” which basically said that a group of optical pulses could move faster than the speed of the light. Du, however, said this was only a visual effect and could not actually be used to transmit real information. People then focused on a single photon moving faster than the speed of light, but “because of lack of experimental evidence of single photon velocity, this is also an open debate among physicists,” Du said.
Now my reasoning is vastly different and not base don science but here we go anyway. To me if time travel were possible then all time would exist at the same time. If it was in the future or past, you would not have to wait for someone to discover time travel because in the far flung future it would be discovered and we would see evidence of it her and now. Any civilization able to travel through time wold probably be wise enough to want to help lesser civilizations and already introduced us to the wonders of the universe. So do to the simple fact that we are unaware of any future super civilizations showing up leads me to conclude that time travel is not possible. Thoughts anyone?