Friday, March 21, 2025

Polaris of Enlightenment

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Dogs are affected by their owner’s mood

Published 10 November 2024
– By Editorial Staff

Dogs and their owners’ heart rates and emotional states strongly influence each other, according to a new Finnish study from the University of Jyväskylä. Researchers confirm that dogs mirror their owners’ emotions, whether they are relaxed or stressed.

The study, published in Scientific Reports, involved 29 dogs and their owners where researchers measured heart rate variability (HRV) and activity levels during rest, as well as various positive activities such as cuddling, exercise, play and sniffing. HRV measures how the time between heartbeats varies and can show, for example, how relaxed or stressed you are, both in animals and humans. For example, a higher HRV value indicates relaxation, while a lower one may indicate stress. The owners were also asked to fill in a questionnaire about their personality and their relationship with the dog.

The researchers found that there was a clear interaction between the dog and the owner’s HRV. For example, the dog became more relaxed if the owner relaxed, but also stressed if the owner became stressed. The dog also influenced its owner’s state. The dog’s heart rate was shown to have a greater effect on its owner’s heart rate than the owner’s own physical condition, such as weight or age.

– It was found that if the dog or the owner was stressed or excited, so was the other party. When one was relaxed, both were relaxed, researcher Aija Koskela told Finnish public broadcaster Yle.

The dogs and their owners’ heart rate variations were generally found to be linked, regardless of activity. But mainly the owner and the dog were influenced by each other during “free activity”, such as resting. The dog’s HRV was influenced by its size, how long it lived with the owner, the owner’s temperament and their interaction.

Koskela points out that the study clearly confirms that the owner’s emotional state also influences the dog’s well-being, which can be valuable for dog owners to know. This type of co-regulation between dog and owner is reminiscent of the interaction seen in close human relationships, where both behavior and physiological responses are synchronized between the parties.

– We often talk about what dogs give us or how it affects us. It would be good to also remember our responsibility for the dog and how our mood affects the animal, says Koskela.

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Swedes are choosing not to have children – even in “good times”

Published 10 March 2025
– By Editorial Staff
In many ways, starting a family has never been easier than it is today - yet more and more people are choosing not to.

Birth rates across the Western world are falling sharply, with Sweden now having just 1.43 children per woman the lowest ever recorded.

It is often claimed that few children are born because of economic turmoil and “bad times” but this explanation is no longer valid, according to researchers.

It is certainly true that historically there has been a clear link between economic prosperity and childbearing, with significantly more children born during economic booms than during periods of mass unemployment and economic crises.

However, about 15 years ago, researchers began to notice that the birth rate was dropping significantly, even though the population was economically well-off and many people had a high standard of living.

– Something interesting is happening in Sweden around 2010 when fertility is declining despite the fact that we have economic growth, falling unemployment, and also zero interest rates, which means that money is more or less free. For many people, this means higher real incomes, says researcher Maria Stanfors, at the Department of Economic History at Lund University.

– All the measures that are usually used as economic indicators are developing positively, but fertility is falling. This perhaps indicates that the decline in fertility is not related to real economic conditions but is explained by something else.

No positive “equality effect”

Why Swedes and other European peoples are having fewer children even in good economic times is a complex question with many explanations and possible causes, but the trend is similar across the industrialized world.

Nor have the ‘gender equality’ efforts of Swedish governments led to an increase in birth rates – quite the opposite.

– Fertility has fallen despite good economic times and family policies have not deteriorated – quite the opposite. It has been suggested that the high fertility rates in the Nordic countries in the past were linked to gender equality. Not only that women work more and that we have relatively small wage gaps, but also that men do more unpaid housework and, above all, are more active fathers than in other countries. But fertility has fallen despite this.

Unclear future

– I think we have lost an understanding of the fantastic support we have in combining work and family in Sweden, and we still share the costs of having children to a greater extent than in other countries. Moreover, as a society, we have never been richer and healthier. The conditions for having children have never really been better, Stanfors continues.

She speculates that the birth rate may increase “in the near future”, but stresses that we do not know when this will happen nor why. According to the researcher, there is very little evidence that individual policy reforms would affect birth rates.

– The fact that all women, regardless of age and family status, behave similarly means that fertility varies. These variations are probably explained by several factors. Given the importance of demography for the sustainability of society, more should be invested in demographic research, says Maria Stanfors.

Researchers: Global genetic diversity is declining – but the trend can be reversed

Biodiversity

Published 10 February 2025
– By Editorial Staff
Scandinavian Arctic foxes are threatened by inbreeding due to a shrinking gene pool.

A new comprehensive study shows that the genetic diversity of animals and plants is declining worldwide.

The study, which is based on the analysis of over 80 000 scientific articles, indicates that birds and mammals are particularly affected. At the same time, the researchers highlight several conservation measures that can slow down the negative trend.

Genetic diversity plays a key role in enabling animals and plants to adapt to changes in their environment. A wide variety of genes increases the chances that some individuals will develop traits that make them more resistant to drought or high temperatures, for example. These traits can then be passed on to future generations and contribute to the survival of the species.

An international research team, including Uppsala University, Stockholm University and the Swedish Environmental Protection Agency, has analyzed genetic changes in 628 species over a period of more than 30 years. The study, published in the journal Nature, shows a global decline in genetic variation.

The study shows that the loss of genetic variation is widespread, which is alarming, but the tools to counteract further loss exist, which is hopeful, says Sara Kurland, postdoctoral researcher at the Department of Earth Sciences, Uppsala University and one of the researchers behind the study.

Restoring important habitats

The researchers highlight five key actions to preserve genetic diversity. One of them is to add new individuals to populations to counteract genetic depletion. In some cases, it may also be necessary to limit the reproduction of certain individuals to prevent inbreeding.

Protecting and restoring important habitats is another measure that can strengthen the genetic diversity of species. For example, restoring wetlands can help create stable ecosystems where populations can grow and diversify.

Where a species is threatened by disease, competition or predation from other species, controlling these factors can be a solution. The Swedish Arctic fox is an example where recovery is hampered by competition from the red fox.

Restoring wetlands is also considered an important measure. Photo: Abrget47j/CC BY-SA 3.0

Reintroduction of species

The final measure highlighted is the introduction or reintroduction of populations in areas where genetic variation has been lost. This is a controversial approach, but in some cases it can help strengthen genetic diversity and increase the survival of species.

– Overall, the study shows that there are effective conservation methods and data that allow for strategic targeting of actions. But then the genetic component must be considered, says Kurland.

– By incorporating genetic considerations when planning and implementing conservation actions, we can protect biodiversity and strengthen the resilience of ecosystems to current and future challenges, adds Catherine Grueber, a researcher at the University of Sydney and leader of the study.

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The moose is one of the species being mapped. Photo: Ryan Hagerty

Hoping for more political support

In Sweden, researchers are already using DNA-based indicators to monitor species such as salmon, trout and moose in a collaboration with the Swedish Agency for Marine and Water Management and the Swedish Environmental Protection Agency.

– The work has identified particularly sensitive stocks of these species, but also those where the situation looks good genetically, says Linda Laikre, professor of population genetics at Stockholm University and one of the co-authors of the study.

The researchers hope that the results will lead to concrete measures and increased political support for conservation work.

Flat Earthers after the Antarctic expedition: “The Earth is round”

Published 18 January 2025
– By Editorial Staff
The Final Experiment may have been the final battle between flat earthers and round earthers...

A group of flat-earthers recently traveled to Antarctica to witness the midnight sun and challenge modern flat-earth theories. After watching the sun circulate continuously for 24 hours, several of them now admit that the flat Earth thesis must be reconsidered.

The expedition, led by Reverend Will Duffy of Colorado, brought together four flat-earthers and four believers in a spherical (round) Earth with the common goal of settling once and for all the debate over the shape of the Earth. The trip, called “The Final Experiment”, took place on December 14 and cost each participant about $35,000.

Jeran Campanella, known for his YouTube channel “Jeranism” and former proponent of the flat Earth theory, took part in the expedition. During a live broadcast from Union Glacier Camp in Antarctica, he admitted:

Sometimes in life you’re wrong. I didn’t believe in a 24-hour sun, but I was wrong.

Flat Earthers have argued, among other things, that Antarctica is actually a wall of ice that surrounds the world and prevents the oceans from overflowing.

They argue that if the Earth were flat, the sun would not be visible 24 hours a day on this continent. The observation of the midnight sun in Antarctica therefore challenges this view, while supporting the theory of a spherical Earth.

Jorden Earth sfärisk
Photo: NASA’s Marshall Space Flight Center/CC BY-NC 2.0

Some skepticism remains

However, despite the convincing evidence, some doubts still remain among flat Earth supporters. Austin Whitsitt, another participant in the expedition, expressed skepticism, saying that the observation does not necessarily prove the roundness of the Earth and stressed the need for further investigation and openness to new data.

The somewhat humorous expedition has attracted attention and debate in both scientific and public circles. From a more serious point of view, many see it as an example of the importance of empirical observations and openness to reconsider one’s beliefs in the light of new evidence.

For those interested in seeing more about the expedition and its results, there is a wealth of video material available on The Final Experiment channel.

Researchers: Extreme climate phenomenon dates back 250 million years

Published 16 January 2025
– By Editorial Staff
El Niño can cause both floods and extreme droughts.

El Niño causes extreme droughts, floods and forest fires in many parts of the world. However, scientists have shown that this is not a new phenomenon it was already happening 250 million years ago.

Today, it is popular to link almost all types of noticeable weather and climate anomalies to human influence and politicians and the media alike often claim that humans are to blame for natural disasters of various kinds.

The exact causes of weather-related phenomena are often difficult to pinpoint. However, even when the continents came together to form the supercontinent Pangea, there were various forms of “extreme weather”, and scientists have discovered that El Niño is much older than previously known.

The ocean phenomenon recurs along with the Southern Oscillation atmospheric phenomenon in the eastern Pacific between approximately every two to seven years. The two phenomena are linked by the common name ENSO (El Niño – Southern Oscillation) and usually last for 9 to 12 months.

The phenomenon affects the temperature, speed and strength of ocean currents and leads to extreme weather in the form of droughts, floods and forest fires, affecting millions of people in places like South America and Australia.

“Long before human history”

Until now, it has been unclear how far back in time the climate phenomenon extends. But in a new study published in the scientific journal Proceedings of the National Academy of Sciences (PNAS), an international team of researchers concluded that El Niño and the Southern Oscillation have a history of at least 250 million years.

– Through climate simulations, we found that ENSO has been a leading climate phenomenon long before human history. This was a major discovery for us, says Zhengyao Lu, a physical geography researcher at Lund University who participated in the study.

The research team used a global climate model and calculations of atmospheric and oceanic processes to map the history of ENSO over a period of ten million years. They also found that the weather phenomenon was significantly stronger in several earlier historical periods than today.

– A better understanding of ENSO’s history can give us new insights into how the phenomenon may change in the future. The results suggest that ENSO will continue to be the most significant source of annual climate variability globally, Lu explains.

Could lead to better forecasts

The new study is said to help scientists develop more realistic climate models in the future in terms of topography, greenhouse gas levels, solar radiation and bathymetry. Zhengyao Lu says the research will provide important information for future climate projections.

– Recent and future extreme El Niño events may be driven primarily by anthropogenic climate change. But on a timescale of 250 million years, natural variability and other factors have led to major changes. In any case, understanding how this climate phenomenon behaves in an increasingly warming world is of utmost importance, he concludes.

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