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A physicist has worked out the math that makes “paradox-free” time travel plausible

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Though time travel has yet to be achieved to the best of our knowledge, scientists are fascinated by the idea that it is theoretically possible.

Moving through time poses many challenges to the fundamental laws of the universe, as depicted in movies like The Terminator, Donnie Darko, Back to the Future, and many others. 

For example, if you travel through time and prevent your parents from meeting, how can you exist to travel through time in the first place?

The “grandfather paradox” is a major puzzle, but last September, Germain Tobar, an Australian physics student, said he had figured out how to “square the numbers” to make time travel possible without the paradoxes.

According to classical dynamics, knowing the state of a system at a given moment can provide information about the system’s entire history, Tobar said in September 2020.

“However, Einstein’s theory of general relativity predicts the existence of time loops or time travel – where an event can be both in the past and future of itself – which theoretically turns the study of dynamics on its head.”

The calculations show the possibility of space-time self-adapting to avoid paradoxes.

Imagine a time traveler going back in time to prevent the spread of a disease. If the mission is successful, the time traveler will have no disease to fight in the future.

According to Tobar’s research, the paradox would be resolved if the disease still managed to find a way to spread via a new pathway or technique. No matter what the time traveler accomplished, the disease would still exist.

Tobar’s work is difficult for non-mathematicians to understand, but it examines how deterministic processes – without any randomness – affect any number of regions in the space-time continuum, and shows how closed time-like curves – as predicted by Einstein – can be consistent with both classical physics and the laws of free will.

“The math checks out – and the results are the stuff of science fiction,” said University of Queensland physicist Fabio Costa, who supervised the research.

The latest study clears up the issue with another theory that time travel is possible, but with restrictions to avoid paradoxes. In this hypothetical scenario, time travelers are free to do as they please, but paradoxes are impossible.

The time machines that scientists have created so far are so high concept that they currently exist only as equations on paper. Although the math may work, actually bending space and time to go back in time remains elusive.

Stephen Hawking believed it was possible, so we might get there someday. If we did, this new study says, we would be free to change the past any way we wanted because it would adjust itself accordingly.

“Try as you might to create a paradox, events will always adjust themselves to avoid any inconsistency,” Costa says. Our discovery of a variety of mathematical techniques shows that free will time travel is logically consistent with our reality and presents no paradoxes.

Research Paper

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‘October Surprise’: Russia To Launch Nukes in Space

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The ‘national security threat’ announced on Wednesday is
about Russia planning to launch nuclear weapons in space, causing some
to speculate whether it’s really an election year ploy.

The panic began when House Intelligence Committee Chair Mike Turner
(R-Ohio) asked President Biden to declassify information about a
“serious national security threat”.

Modernity.news reports: The weapon would reportedly be designed to be used to take out satellites.

Speaker Mike Johnson (R-La.) responded by telling reporters he wanted “to assure the American people, there is no need for public alarm.”

The big, scary threat is serious business and involves a space-based nuke controlled by evil dictator Putin, but it’s also “not an immediate crisis,” according to what three members of the U.S. House Intelligence Committee have told Politico.

Okay, then. Just for election season, is it?

Zero Hedge reports: “So, the question is – was this:

a) a distraction from Biden’s broken brain, or

2) a last desperate attempt to get more funding for anything-but-the-US-border, or

iii) a path to pitching Putin as the uber-bad-guy again after his interview with Tucker Carlson.”

Just by coincidence, Mike Turner recently returned from Ukraine having lobbied for billions more in weapons and aid for Zelensky’s government.

Some questioned the timing, suggesting it might all be a deep state plot to keep American voters afraid when they hit the ballot box.

Speculation will now rage as to whether this is “the event,” real or imagined, that billionaires and elitists the world over have been building underground survival bunkers in preparation for.

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Earth has built-in protection from asteroids

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Asteroids are not just wandering space rocks, but a potential threat
to Earth. But what if the Earth already has its own built-in defenses
against them? Recent research published on the preprint server arXiv puts forward an unusual theory: Earth’s gravitational forces may serve as its secret shield against asteroids.

Our
planet uses powerful gravitational interactions with other celestial
bodies to break apart asteroids that approach it. These tidal forces,
akin to those that explain Earth’s tides caused by the Moon, can be so
intense that objects undergo tidal disruption, causing them to be torn
apart.

Observations of fragments of Comet Shoemaker-Levy 9 after
its collision with Jupiter in 1994 provided the first confirmation of
this phenomenon. However, for decades astronomers have been looking for
evidence that Earth or other terrestrial planets could have a similar
effect on asteroids and comets.

Planetary scientist Mikael Granvik
from the Swedish University of Technology, Luleå, led the research that
came closer to solving the above phenomenon.

His
discovery is linked to the search for gravitationally disrupted
near-Earth asteroids (NEAS), and provides compelling evidence that our
planet’s gravitational forces are not just an abstract concept, but a
factor capable of breaking asteroids into small pieces.

Based on
modeling of asteroid trajectories, Grunwick and colleague Kevin Walsh of
the Southwest Research Institute found that collisions with rocky
planets can cause asteroids to lose a significant portion of their mass,
turning them into debris streams.

New data shows that small
asteroid fragments, while not posing a threat to life on the planet, may
nevertheless increase the likelihood of local collisions like those
that occurred in Tunguska and Chelyabinsk.

Granwick assures that
asteroids smaller than 1 km in diameter are not a critical threat, but
increase the likelihood of incidents. However, it is worth remembering
the additional risks that may arise due to the formation of new debris
clouds.

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