While time travel has so far only existed in sci-fi movies, experts believe that the time machine is practically invented. Scientists are still working on how to make it as effective as possible, like in a movie.
According to Albert Einstein's theory of relativity, time depends on how fast you move. The faster you move through space, the slower you move through time, according to Ohio State University astrophysicist Paul Sutter. According to the scientist, in order to travel in time, a person does not need complex time machines. One large rocket is enough.
Time travel is already taking place. Astronauts living on the International Space Station travel faster than people on Earth. This means they age more slowly in space than at home.
A real time machine is also the Large Hadron Collider, which moves protons at almost the speed of light. This is the speed that causes the relative time of protons to flow about 6,900 times slower than their normal state. Basically, protons are sent to the future.
However, astronauts and subatomic particles, sent into the future for a second, are far from transporting people through the years and centuries. There is still a huge gap between anticipated time travel and reality. First you need to create a ship that could move at the speed of light. The necessary energy costs and safety measures for such a spacecraft would be enormous, which means that a full-fledged time machine will not be invented in the coming years.
