Scientists and philosophers around the world have long debated the possibility of traveling back in time and eventually change history. While it may sound impossible for most people since they’re familiar with the Newtonian concept of time (stating that time is universal, the same in all across the Universe), it’s at least theoretically possible.
Einstein proved mathematically a century ago that time is relative – with the notorious theory of special relativity, the world’s most renowned physicist showed us that time will dilate itself depending on the speed of an object.
The twin paradox
This is a hypothetical experiment that shows very well how oddly time can behave, according to Albert Einstein’s theory of special relativity. It simply claims that if somebody travels with a spaceship able to fly at the speed of light, when he gets home he will find his twin brother much older than him. This happens because time runs much slower when an object approaches the speed of light, although the traveler doesn’t feel any difference. Therefore, the two twins are not actually twins anymore, and you can also say that one of them has been traveling forward in time.
Ron Mallett says we can finally build a time machine
Ron Mallett is a physics professor at the University of Connecticut, and he recently stated for CNN that he can build a long-awaited time machine. But as it is accepted by scientists that traveling to the future could be possible, traveling back in time seems impossible. But Mallett believes the opposite.
The physicist also relies on Einstein’s theory of general relativity, which states that big objects such as planets and stars are able to bend spacetime. This is practically how gravity works. Mallett states for CNN something very logical:
If you can bend space, there’s a possibility of you twisting space,
In Einstein’s theory, what we call space also involves time — that’s why it’s called space time, whatever it is you do to space also happens to time.
He believes it’s at least theoretically possible to distort time into a loop that would allow it to be intent into the past. Maillett detailed for CNN how he would do it:
By studying the type of gravitational field that was produced by a ring laser,
This could lead to a new way of looking at the possibility of a time machine based on a circulating beam of light.
Is it someone who never wanted to travel to the past in order to change some personal decisions or the flow of history? Unfortunately or not, we still have plenty more time to wait until a certain possibility.