Time travel is a popular topic in science fiction media. The late philosopher David Lewis identified it in his article “The Paradoxes of Time Travel” as such “[involving] A contradiction between time and place. any traveler who departs and then arrives at his destination; The time elapsed from departure to arrival… is the duration of the flight. “
Most people usually understand time travel as going back to a past era or jumping forward to a point in the future. But how much of an idea is grounded in reality? Is it possible to travel through time?
Is time travel possible?
According to NASA, Time travel is possibleNot in the way you might expect. Albert Einstein’s theory of relativity says that time and motion are proportional to each other, and nothing can be faster than that light’s speed, that is 186,000 miles per second. Time travel occurs through what is called ‘time dilation’.
time dilationAccording to Live Science, it is how one’s perception of time differs from another, depending on their movement or where they are. Hence, time is being relative.
Dr. Anna Alonso Serrano, a postdoctoral researcher at the Max Planck Institute for Gravitational Physics in Germany, explained the possibility of time travel and how researchers are testing theories.
Alonso Serrano said that space and time are not absolute values. And what makes this even more complicated is that you are Capable of sculpting spacetime.
“The moment you sculpt spacetime, you can play with that curvature to make time come in a circle and you make a time machine,” Alonso Serrano told USA TODAY.
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She explained how time travel is theoretically possible. The mathematics behind creating the curvature of spacetime is solid but trying to recreate the exact physical conditions needed to prove these theories can be challenging.
“The hard point about that is to find a physical and realistic way to do it,” she said.
Alonso Serrano said: wormholes And the warp drives They are the tools that are used to create this curvature. The problem needed to achieve the curvature of space-time through a wormhole strange substancewhich was not successfully executed. She said researchers don’t even know if this type of substance even exists.
“It’s something we’re working on because it’s theoretically possible, and because it’s a very great way to test our theory, to look for potential paradoxes,” Alonso Serrano added.
Beyond the above methods, Alonso Serrano isn’t sure what other methods time travel uses.
“I can’t say nothing is possible,” she said, “but I can’t ignore that possibility.”
As I mentioned anecdote Stephen Hawking’s Champagne Party for Time TravelersHawking had their own GPS location for the party. He hadn’t sent out invitations until the party had already taken place, so only people who could travel to the past would be able to attend. No one attended and Hawking referred to the event as “empirical evidence” that time travel was not possible.
This article originally appeared on USA TODAY: Is time travel possible? The science behind the possibility.