Time travel - is it science fiction or a real-life possibility

Is time travel a science fiction fantasy, or could we actually go back in time using a space-time machine? Scientists have long hypothesized and fantasized about the possibility of time travel, pondering whether it is achievable with advances in technology.

Recent studies suggest that time travel is theoretically possible based on our understanding of Einstein's theory of special relativity and spacetime. However, whether or not a real space-time machine would be feasible has yet to be determined.

Do scientists believe time travel is possible?

To what extent do experts doubt the feasibility of time travel? Despite popular speculation about time travel in movies and science fiction, many scientists remain skeptical (Source 1).

Physical theories such as special and general relativity suggest that certain types of motion in space may allow for the possibility of time travel into the past or future.

However, there is no scientific evidence to support this, and some experts disagree with the theoretical underpinnings of these possibilities. Furthermore, any theory that allows for time travel may introduce various problems of causality that may prove insoluble. 

According to some physicists, paradoxes associated with backward time travel may be resolved by invoking principles such as Novikov's self-consistency principle or variations of the many-worlds interpretation (Source 2).

Can we go back in time according to Einstein?

Albert Einstein's theory of relativity states that time is not absolute and can actually be distorted depending on the speed of objects in relation to each other. While this creates the possibility of time travel, there is no scientific evidence or proof that it will ever become a reality. 

Theoretically, time travel could be accomplished by traveling faster than the speed of light, which has yet to be achieved.

According to Albert Einstein's theory of relativity, time travel into the past may be possible through a phenomenon called the Einstein-Rosen Bridge. 

More commonly known as a "wormhole," this theoretical phenomenon could potentially warp space-time in such a way that two distant points in space are connected, allowing one to physically move from one location to the other, potentially allowing backward travel through time (Source 3).

SpaceTime Machine

The Parker Solar Probe is the fastest spacecraft ever built, traveling at 0.00067 percent of the speed of light. However, this is still far from the speeds required for time travel. To reach such speeds would require a more efficient fuel than we currently have. And there's another obstacle: finding the enormous amount of energy needed to propel the ship that fast.

What's more, if a traveler were able to get aboard such a spaceship, he or she would need regular supplies of food, water, and medicine, as well as gradual acceleration technology to ensure that the traveler didn't suffer any intense G-force impacts.

But while creating a time machine may be too imaginatively overwhelming for some of us mere mortals, that doesn't mean it's completely out of the question. Thanks to science and some creative solutions from researchers like Robert L. Gott, there are ways it could be done-through wormholes and cosmic strings, for example-though many obstacles remain. 

With enough resources devoted to this ambitious task (as happened with Kennedy's mission to land on the moon), something tangible could be achieved in our lifetime...but don't expect exact replicas of movies like "Back To The Future" or "Planet of the Apes".