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Earth’s magnetic north pole is moving towards Siberia! Will it be dangerous? Know more – The Financial Express

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The magnetic poles can flip if they move far enough out of their positions.

The Earth’s magnetic north pole often moves from its original position. However, now, the magnetic north is drifting around in an aimless manner and has picked up speed, heading away from the Canadian Arctic towards Siberia, according to an IE report. The swift pace of the movement is astounding and has left the scientists confused and it has increased the concerns over navigation, especially in areas of high latitudes. The magnetic north pole of the planet or the ‘N’ on the compass is different from the geographic north pole. While the geographic north pole is in the same place as it always was, ‘N’ is never stationary as the fluctuations in the flow of the molten iron which forms the Earth’s core, continue to affect the Earth’s magnetic field.

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The Earth’s magnetic north pole was first discovered in the year 1831 and has travelled around 2,250 kilometres since then. Generally, the wandering speed of the pole remains quite slow, which allows the scientists to keep a proper track of its position easily. However, according to the NOAA’s (National Oceanic and Atmospheric Administration) National Centres for Environmental Information (NCEI), the drifting speed of the magnetic north pole has gathered pace in the past few decades. This has been accelerating to an average speed of 55 kilometres per year. Although, scientists cannot explain the core fluctuations which are responsible for the drifting of the North pole, the World Magnetic Model (WMM) allows them to map the planet’s magnetic field and calculate its rate of change over passing time. This system is a representation of the magnetic field observations which power navigational tools such as the global positioning system (GPS), mapping services, as well as consumer compass applications.

The government agencies across the world, including American space agency NASA, the Federal Aviation Administration (FAA), and also the US Forest Service, utilise the magnetic poles in their everyday operations from mapping to air traffic control. Every five years, the WMM readings need to be updated, in order to keep the model accurate. It was last updated in the year 2015, however, the sudden movement of the magnetic north has pushed the WMM to update the model early on.

The magnetic poles can flip if they move far enough out of their positions. The scientific evidence suggests that this has happened in the past and the phenomenon can happen every few hundred of thousands of years. Scientists do not know for sure, when the next flip will occur and there is no evidence that such a flip is near. However, if there is a flip, there will be some implications on human life as humans depend heavily on the technologies which rely on magnetic poles.

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One new case of COVID-19 reported Sunday in Newfoundland and Labrador – Squamish Chief

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ST. JOHN’S, N.L. — Public Health officials in Newfoundland and Labrador are reporting one new confirmed case of COVID-19.

The new case, announced Sunday, involves a man between 20-39 years of age in the Eastern Health region.

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They say the case is travel-related.

The man was returning home to the province from Manitoba.

Officials say he has been self-isolating since arrival and following Public Health guidelines.

However, the Department of Health and Community Services is asking people who travelled on WestJet Flights 306 and 328 departing Winnipeg and Toronto for St. John’s on Monday, Sept. 21 to call the 811 non-urgent health line to arrange for COVID-19 testing.

They say the request is out of an abundance of caution.

The province has two active cases of COVID-19 and 268 people have recovered from the virus.

This report by The Canadian Press was first published Sept. 27, 2020.

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Paradox-Free Time Travel Is Theoretically Possible, Researchers Say – WBFO

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“The past is obdurate,” Stephen King wrote in his book about a man who goes back in time to prevent the Kennedy assassination. “It doesn’t want to be changed.”

Turns out, King might have been onto something.

Countless science fiction tales have explored the paradox of what would happen if you do something in the past that endangers the future. Perhaps one of the most famous pop culture examples is Back to the Future, when Marty McFly went back in time and accidentally stopped his parents from meeting, putting his own existence in jeopardy.

But maybe McFly wasn’t in much danger after all. According a new paper from researchers at the University of Queensland, even if time travel were possible, the paradox couldn’t actually exist.

Researchers ran the numbers, and determined that even if you make a change in the past, the timeline would essentially self-correct, ensuring that whatever happened to send you back in time would still happen.

“Say you travelled in time, in an attempt to stop COVID-19’s patient zero from being exposed to the virus,” University of Queensland scientist Fabio Costa told the university’s news service.

“However if you stopped that individual from becoming infected — that would eliminate the motivation for you to go back and stop the pandemic in the first place,” said Costa, who co-authored the paper with honors undergraduate student Germain Tobar.

“This is a paradox — an inconsistency that often leads people to think that time travel cannot occur in our universe.”

A variation is known as the “grandfather paradox” — in which a time traveler kills their own grandfather, in the process preventing the time traveler’s birth.

The logical paradox has given researchers a headache, in part because according to Einstein’s theory of general relativity, “closed time-like curves” are possible, theoretically allowing an observer to travel back in time and interact with their past self — and potentially endangering their own existence.

But these researchers say that such a paradox wouldn’t necessarily exist, because events would adjust themselves.

Take the coronavirus patient zero example. “You might try and stop patient zero from becoming infected, but in doing so you would catch the virus and become patient zero, or someone else would,” Tobar told the university’s news service.

In other words, a time traveler could make changes — but the original outcome would still find a way to happen. Maybe not the same way it happened in the first timeline; but close enough so that the time traveler would still exist, and would still be motivated to go back in time.

“No matter what you did, the salient events would just recalibrate around you,” Tobar said.

The paper, “Reversible dynamics with closed time-like curves and freedom of choice,” was published last week in the peer-reviewed journal Classical and Quantum Gravity. The findings seem consistent with another time travel study published this summer in the peer-reviewed journal Physical Review Letters. That study found that changes made in the past won’t drastically alter the future.

Best-selling science fiction author Blake Crouch, who has written extensively about time travel, said the new study seems to support what certain time travel tropes have posited all along.

“The universe is deterministic and attempts to alter Past Event X are destined to be the forces which bring Past Event X into being,” Crouch told NPR via email. “So the future can affect the past. Or maybe time is just an illusion. But I guess it’s cool that the math checks out.”

Copyright 2020 NPR. To see more, visit https://www.npr.org.

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Starship SN8 prepares for test series – First sighting of Super Heavy – NASASpaceflight.com

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Starship SN8 prepares for test series – First sighting of Super Heavy – NASASpaceFlight.com

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