It did not depend on humanity

There is still the second half of the year, but at this point we can affirm (and without fear of being wrong) that 2025 is not being easy. Commercial wars. War in Ukraine. War in Gaza. War In Iran. For not leaving us, 2025 does not even leave us the comfort to relieve penalties with chocolates or good coffee, both subject to a inflationist spiral. With everything and no matter how bad face that has 2025, something is clear: it will hardly be worse than the 536 AD, the worst year in history. Never in attractive already a bloody history of humanity has been worse to be alive. And that is something that there is enough consensus. The worst year in history? There are titles for those who do not lack applicants. And the “worst year of history” is undoubtedly a clear example. If we look back, we find a few candidates of infamous memory: 1347, when the plague epidemic (“Death megra”) began to expand through Europe; 1914, the year in which the World War I; 1918, marked by the beginning of The flu pandemic or 1939, when the world went back to war. You don’t even have to go back so back in time. In March Of 2022, WHO declared that COVID-19 had become a pandemic that, throughout the following years, would lead to entire countries to the edge of paralysis and would charge millions of lives. According to the UN, only between January of that year and late 2021 died 14.9 million people for causes related to the virus. What has been the worst then? A few years ago the magazine Science He asked that question To the historian Michael McCormickHarvard’s professor, and his response was as forceful as it is necessary: ​​the worst year to be alive was the 536 of our era. Your answer is interesting for several reasons. The first, because beyond its academic prestige, McCormik is has dedicated to study In detail what happened that infamous year of the seventh century. Second, because is not the only one That believes it. “It was the beginning of one of the worst periods to be alive, if not the worst year,” McCormik insistsat the head of the university initiative for the science of the human past in Harvard (Sohp). The most curious thing is that unlike what happened in 1914 and 1939 (when both world wars exploded) or even during the pandemics of Spanish flu and Covid-19, largely propagated thanks to people, in what happened in 536 AD Humanity played a minor role. What happened that year? A natural catastrophe that affected sunlight and temperature of much of the world. As Remember em Sciencethat summer the average values ​​in Europe 2.5ºC descendedwhich marked the beginning of the most cold decade in a period of 2,300 years. It is said that China even saw how it snowed in summer. That sudden change resulted in ruined crops, famine and testimonies that even account for the astonishment of the contemporaries. “The sun seems to have lost its usual light and has a bluish tone. We are marveling not to see the shadows of our bodies at noon and feel that the powerful vigor of its heat has weakened,” I wrote In 538, Roman senator Casodoro. Even more mysterious was the historian Procopio, who that same year He spoke From “a fearsome omen”: “The Sun emitted its light without brightness, just like the moon, all year.” And what was the cause? That the second third of the sixth century DC was unusually cold is no novelty. The experts had been suspected for a long time, and not only for testimonies such as those of Casodoro or Procopio. In the 90s the Rings studies of trees (Dendrocronology) They already suggested to the experts an unusual drop in temperatures towards the 540s. The big question is … why? The study of the polar ice cores of Greenland and Antarctica threw a fundamental clue: the phenomenon could be related to massive volcanic eruptions. When a volcano erupts, it throws large amounts of sulfur and bismuth into the atmosphere, among other particles that act as a gigantic veil that reflects sunlight, which in turn derives in less time of clarity and a decrease in temperatures. In fact, remember in Sciencethe study of glaciers and tree growth rings suggests that a good part of the most “icy” summers recorded in recent centuries have been preceded by eruptions. But what happened in 536? Years ago, researchers concluded that what happened fifteen centuries may be related to a massive eruption registered between the end of 535 or early 536 in North America and which years later (540) followed another. The wind and meteorology were responsible for making the rest and extending the particles to Europe and Asia. Over time that explanation has been profiling and In 2018 A quip directed among others by McCormick already spoke of a cataclysmic eruption recorded in Iceland in early 536 to which, throughout the following decade, another two were followed, in 540 547. It is not the only theory. There are those who speak of the effect of the dust of the comets or an unknown underwater eruption, a conclusion to which a group of experts arrived Not long ago After studying the ice of Greenland. How serious was it? Yes. Let it clear Thousands patternhistorian of the University of Oxford, in An article Posted in The conversation: “Wherever it was, the eruption precipitated a ‘volcanic winter’ of a decade in which China suffered summer snows and the average temperatures in Europe fell 2.5ºC. The crops did not prosper. People went hungry. And they rose in arms against each other.” A year and a half marked by a mysterious fog that extended in Europe, the Middle East and part of Asia and whose impact soon was aggravated by other factors. In 541 the bubonic plague arrived at the port of Pelusio and marked the beginning of the Justinian plaguedevastating for … Read more

Humanity has been using the Earth’s magnetic field as a navigation guide. Some researchers want to retire it

In recent decades, GPS has become part of our day to day. If it is a military technology, the global positioning system has been guided by roads, forests and seas, in the city and in the mountain, but always with an important limitation, access to satellites that place our navigation devices. That could change. Magnav. Thanks to magnetic navigation systems or Magnav, and more specifically to a new development that uses a quantum adjustment system that promises more precise navigation. A navigation, in addition, immune to interference, accidental or caused, which allows significantly reducing satellite navigation dependence. Magnav systems (Magnetic-Anomaly Navigation) o Navigation by magnetic anomaly are based on the fact that the Earth’s magnetic field It is not uniform. That is why it is possible to use a magnetometer that indicates our position by measuring small variations in the magnetic field of the planet. Use the Earth’s magnetic field as Navigation reference It is not something new but something we have been doing since the invention of the compass, but the new system promises to achieve unusual precision. That’s where the quantum dimension of the new system comes into play. Navigation “quantum”? The new technology, They explain their developersis based on the use of quantum magnetometers that combine a noise elimination system with a cartographic algorithm. The magnetometers are based on the optical detection of the precession of the atomic spin, for which they use a steam cell that contains rubidium atoms, They detail. This technology opens the door to measure the magnetic field of the Earth with greater precision, which translates into a better capacity to locate ourselves on the map. All this, they also highlight, in a device small enough to be used in autonomous vehicles or in fixed wing drones. Q-ctrl. Behind this system is an Australian company, Q-Ctrl (name that refers to “Quantum Control”) The company emerged in 2017 Like a Spin-off of the quantum science group of the University of Sydney. By land and air. RecieBy land and air. Recently, the team responsible for this system put it to the test. With satisfactory results: the device obtained errors in the measurements up to 46 times less than the inertial navigation systems usually used as a complement to the satellite. The measurements were made on flights at a height of 19,000 feet, in which it was also possible to fly with a total error in the 22 -meter trip, 0.006% of the distance traveled. The results were “consistently” at least 11 times better than those obtained with inertial systems. The team responsible for the development of the new tool has published some details in an article. The article has not passed the pairs review filter but can be found freely Through the repository Arxiv. Substitute or complement. Satellite navigation systems are central today and this is precisely its weak point: the emergence of GPS signals puts both commercial routes and passenger transport, but it could also put into check military operations in cases of armed conflict. The interception of these signals can therefore be used as well as a commercial and war weapon. We have various tools that allow satellite navigation to attend, but few systems can at the same time have the accuracy of these without depending on them. That is why having alternative mechanisms of high precision can be more precise than ever. In Xataka | The North Pole is moving very fast, and that has forced many airports to rename their clues Image | NOAA NCI / Q-ctrl

The 1803 map that aspired to summarize the entire history of humanity

He 19th century It is still today one of the most fascinating periods in history. It produced numerous ideological, political and technical revolutions that forever shaped contemporary times. At the same time, he opened the doors of a world, expanding numerous discoveries, contacts between various civilizations and scientific advances. The change was structural and all levels. Hence the cartography also evolved. The dawn of modernity were plagued by graphic innovations that would give way to the cartographic crafts of our time. It was no longer simply to represent the world (after the century it would already be practically explored and uncovered in its entirety), but to locate the human being in it. Nature tamed, wasn’t it time for map To humanity itself? We have already seen how Illustrators like JH Colton either John B. Sparks They tried to do so through an innovative format: the river, a continuous current since the beginning of the times of which They would break down tributaries in the form of cultures and civilizations. Those were imaginative and prisoners of their time, plagued by a rampant Eurocentrism and full of historical and political clichés. However, they were interesting for themselves, because they aspired to capture in a single graph the passage of time. All the time. The work of both, but especially of Colton, would contribute to expand the explanation of history and social geography through graphic tools. But it wasn’t seminal. Such honor may correspond to the author of the probably first histomapa always: Friedrich StrassAustrian cartographer. Entitled Der Strom der Zeiten (The current of time), The Enlightenment would see the light as soon as 1803, time before Napoleon had raised his empire. The excellent graphic and bold finish of the representation would enjoy great success, being translated into several languages ​​and serving of remote influence for other activists, educators, geographers and illustrators (From Emma Willard until Eugene pick). Der Strom der Zeiten I drank in part of Joseph Priestly’s ideasBritish philosopher, and aspired to capture a vertical understanding of the history of human beings. Under the title of “History of the World”, part of a gray nebula of which cultures already known by then. The Greeks, the Assyrians, the Italians, the Chinese or the Phoenicians. Strass focuses your attention in European peoples and cultures, marginalizing the development or prominence of African or Asian empires. The beginning of everything. (David Rumsey Collection) Detail of the first villages. (David Rumsey Collection) The importance of the Roman Empire. (David Rumsey Collection) It was a common evil of the illustrators, intellectuals, scientists and European thinkers of the time. China and India monopolized half of the world’s population and half of its economic production for centuries. However, the Strass river quickly focuses on The Roman Empire Like the Muñidor of so many civilizations of the present, and from which numerous central states would arise to the development of Europe, such as Spain or France. Eastern cultures. (David Rumsey Collection) Latin kingdoms. (David Rumsey Collection) Taxes arise, unify and disappear as time progresses. Strass’s historical gaze was essentially elitist: he listed the monarchs and leaders based on their possessions (Felipe II and Carlos V become the longest river tributary of their time) in chronological way. To the right are felt Asian civilizations. Others, such as African or American, do not even appear. Der Strom der Zeiten It is an incomplete map of human history, but one of great relevance for the development of a different look at the passing of time and the position of the human being in it. And next to all this, it is still beautiful today. In Xataka | The way in which each European language counts up to 99, explained in an interesting map In Xataka | The lunar map of Johannes Hevelius, the first satellite cartography published in 1647

Going to space is going from a great aspiration of humanity to a “Ryanair with rockets”

When Andy Davis opened his birthday gifts that afternoon of 1995, I was about to certify One of the most important changes of the cultural imaginary of the American twentieth century: the death of Western and the consecration of the astronaut as a great aspirational figure. Because, forgive me the expression, but how astronauts were cool. We talked about people who prepared for decades, who risked their life every fighter second and who achieved feats that we, simple mortals, could not even imagine. There was nothing more glamorous and guay than to be an astronaut. Now The thing has changed. The life cycle of all means of transport. When the train was invented, first There was curiosity. Then, fear. Later, luxury. And finally, The Rodalías de Barcelona either The Extremadura train. It is a law of life: a kind of Kübless model of the social perception of the means of transport. The same thing happened with the planes. From the first test flights we move on to Spirit of Sant Luisthen to the luxurious airplanes of the 60s And, now, a manifestly bad service that we usually associate with lowcost airlines, but that affects the entire sector. In space, we are living that process and we are living it very quickly. But why? In the background, what we are seeing is the logical development of the privatization of the space race. And, as we have been pointing for years, what has been privatized now is not space. The space has been privatized for many years. What we are living is the privatization of spatial sleep. Or, in other words, what we have seen is the birth of companies that are knowing how to take advantage of space rhetoric to find financing (winning the large agencies). Behind all that space rhetoric … The new space race does not “become an interplanetary species” or take “tourists to space.” The new special career goes, for now, to finance the development of an infrastructure Very expensive, very lucrative and that will be indispensable in the future. When Jeff Bezos said that the great battle is in whom it is responsible for taking out the devices from the earth (the basic infrastructure of the new space race or, as he said, The ‘Amazon Web Services’ of space) He was right, but fell short. There is Many critical services They will depend on what happens up there. Tourism (and the ‘banalization’ of space) is key in all this. Since Dennis Tito became the first space tourist In 2001 (and counting The six of Jesús Calleja’s last trip) About 84 people have gone to space to do something we could call “tourism.” That is to say, Jesús Calleja is a symptom of that progressive banalization of space, yes; But we already had many previous examples. The key is to take the analysis one step further: in understanding that the ‘democratization’ of space trips come to replace the spatial epic of the cold war years. It is its “aggiornamento”, its contemporary version: the story that serves to continue moving the gears of the development of the space industry. That is why it makes sense that a television star goes to space, so it makes sense wanting to lower costs, so it makes sense to take many people. Because as with the lowcostthe business is another. And, in normal conditions, it would be very interesting. After all, the twentieth century has taught us that every euro invested in space It is a euro invested in improving the conditions of this planet. Historically, The return of investment is huge And that has been one of the great levers that have allowed us to continue investing in it. However, as the years go by and we see that the business career derives quickly in A power struggleit is worth asking if the transfer of knowledge will remain so effective. If, in one way or another, the privatization of space will also be the privatization of all the good we can learn from it. Image | Club of the Future In Xataka | If the space industry wants to democratize tourism, it must overcome several challenges. Like space smells good

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