New Model Shows That Time Travel Is Possible, But Naturally, There's a Catch

Monday, 17 December 2018 - 10:56AM
Weird Science
Science of Sci-Fi
Monday, 17 December 2018 - 10:56AM
New Model Shows That Time Travel Is Possible, But Naturally, There's a Catch
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If given the opportunity, most of us would jump at the chance to travel through time. It's something that sci-fi nerds and writers have dreamt about for a long time, but could that dream someday become a reality? According to a new paper published by Caroline Mallary, a doctoral student at the University of Massachusetts, Dartmouth, a spacecraft capable of traveling through time is theoretically possible, but you would need infinite density to build it.

In an article for The Conversation, Gaurav Khanna, Mallary's physics professor at University of Massachusetts, Dartmouth, wrote about previous research on the subject and shared how Mallary approached the problem with a new model. Published in the Classical & Quantum Gravity journal, the model is different from previous models in that, according to Khanna, it "does not require any negative mass exotic material and offers a very simple design...Mallary's model consists of two super long cars – built of material that is not exotic, and have positive mass – parked in parallel. One car moves forward rapidly, leaving the other parked. Mallary was able to show that in such a setup, a time loop can be found in the space between the cars."

via GIPHY

One thing that Mallary's model does require, however, is that each car contain a singularity with infinite density, temperature, and pressure. "Unlike singularities that are present in the interior of black holes, which makes them totally inaccessible from the outside," Khanna writes, "the singularities in Mallary's model are completely bare and observable, and therefore have true physical effects." Unfortunately, such objects are not known to exist in nature, so until physicists can create them or find another way, it looks like time travel is still something we'll have to dream about. Or, maybe we can speak to a guy who has already done it?
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