Why time travel will remain a sci-fi fantasy

physics4me

Scientists prove nothing can travel faster than the speed of light  

No heading Back To The Future: Scientists have proved that a single photon obeys Einstein’s theory that nothing can travel faster than the speed of light and that time travel is therefore impossible  

For those that while away their days dreaming about travelling into the distant past or future, it is disappointing news.

But scientists claim to have proved that a single photon obeys Einstein’s theory that nothing can travel faster than the speed of light – meaning time travel is impossible.

Their findings close a decade-long debate about the speed of a single photon, the fundamental unit of light.

Lead researcher Professor Shengwang Du, from the Hong Kong University of Science and Technology (HKUST), said: ‘The results add to our understanding of how a single photon moves. They also confirm the upper bound on how fast…

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