Objects, including spacecraft, could pierce through the universe using several black holes as a ‘shortcut’, a new study suggests.
The new theory posited by French physicist Pascal Koiran marks a break from earlier research in the field of black hole studies. Previously, it was thought that a so-called ‘wormhole’ composed of two black holes would be prone to instantly collapse, thus making it impossible for an object to successfully travel all the way from one side and out the other. However, by employing different metrics, the French scientist’s new model has arrived at a very different conclusion: “We show that the particle reaches the wormhole throat for a finite value t′1 of the time marker t′.” In essence, that means an object, for instance, a spacecraft, could pass through this wormhole portal intact and reach some far-away region of the universe, taking far less time than would be needed if traveling conventionally.
The study in its entirety will see the light of day in the upcoming issue of the Journal of Modern Physics D, though an abstract has been available since early October.
Yet, there are too many ifs as to whether this purely theoretical model has any bearing on the way the universe actually works. For starters, to create such a time-and-space tunnel you would need a regular black hole and a so-called white hole, which is essentially a black hole in reverse. While black holes never let anything out, their ‘twins’ never let anything in. So, according to Albert Einstein’s theory of general relativity and Nathan Rosen’s additions to it, if you were to connect the two, they would make up a bridge across time and space. However, if the laws postulated by another branch of physics, thermodynamics, are anything to go by, such a construct would be highly unstable. Perhaps more importantly, the very existence of white holes has yet to be proven beyond a reasonable doubt. At present, they remain a pure theorization, thus putting any talk of space-and-time portals on rather shaky ground.
Protests against renewed Covid-19 restrictions turned violent in The Hague. The unrest comes a day after several demonstrators in another Dutch city, Rotterdam, were injured amid police gunfire.
Seven people were arrested after fierce clashes broke out between law enforcement and anti-lockdown demonstrators in The Hague, the seat of the International Court of Justice (ICJ), on Saturday.
A video shared on social media shows protesters lighting firecrackers that sparked multiple fires, causing the skies in the city to glow an eerie red.
The Hague burns🔥, home of international court of justice, the seat of Dutch cabinet and 3rd largest city in Netherlands pic.twitter.com/8gjqu2sE60
Dutch police reported that five of its officers were injured in the showdown with rioters. One officer was taken to hospital with a knee injury and concussion. Two others “suffered hearing damage,” while another two suffered injuries to their hands.
The chaotic scenes in the Netherlands’ third-largest city unfolded a day after a protest against reimposed Covid-19 restrictions in Rotterdam was marred by violence. Over 50 people were arrested in the city and three were injured after police opened fire in a bid to quell the unrest. Police later claimed that officers were “compelled to shoot at targets” to protect themselves. The three injured protesters remain in hospital, and their condition is unknown.
Protests have swept through a number of Dutch cities after the Netherlands became the first country in Western Europe since summer to go into a partial lockdown last week. Tensions soared further after the government banned New Year’s Eve fireworks displays and the Dutch parliament backed the introduction of the so-called 2G system, which would bar the unvaccinated and those who have not recently recovered from the virus from a long list of public places if introduced.
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Sports goods retailer Decathlon has said it won’t be selling canoes in its stores in northern France anymore because the light vessels are increasingly being used by migrants trying to cross into England.
“Given the current context… the purchase of canoes will no longer be possible” in Decathlon stores in Calais and Grande-Synthe, outside Dunkirk, the French retailer announced.
The two cities overlook the Strait of Dover, which is the narrowest point in the English Channel. Thousands of migrants have been using this spot in recent years to try to make the dangerous 34-kilometer-long sea journey from France to the UK.A lot of canoes aren’t being purchased for their original sporting purpose, Decathlon complained.
They “could be used to cross the Channel” and as a result of this, “people’s lives would be endangered,” it pointed out.
“We are committed to never putting our customers at risk in the use of our products, whatever the circumstances,” the company said.
The initiative to remove canoes from the shelves came from the stores themselves and was backed by the head office, according to the retailer. However, Decathlon will keep selling the vessels online and in its other shops across France.
Last Thursday, two canoes were found adrift in the Channel near Calais, while two migrants were rescued from the water. The next day, three more people were reported missing after attempting to get to England using canoes.
Tensions between London and Paris are high after a record number of migrants – 1,185 – were able to cross the Channel a week ago.
Britain said it was “unacceptable” that France had let so many people slip through, but the French government insisted they were “neither their collaborators nor their assistants” and blamed the soaring crossings on the smugglers and the UK’s labor market, which makes the country attractive to people eager to “work at low cost.”
