Tuesday, March 25, 2025

Polaris of Enlightenment

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Study finds women are better at interpreting emoticons than men

Published 11 March 2024
– By Editorial Staff
Emoticons are not always easy to interpret.

Women interpret emoticons better than men, research shows. Researchers believe this is because these small digital pictograms used to express an emotion can be ambiguous and are perceived differently by different people.

The study, conducted at the University of Nottingham’s School of Psychology, involved 523 adults, 49% of whom were male and 51% female. The subjects were asked to look at 24 different emoticons that the researchers had labeled with an emotion.

The emoji in the study, which came from Apple, Windows, Android, and WeChat, symbolized one of six emotional states: happy, disgusted, scared, sad, surprised, and finally angry. The researchers found that women were better at interpreting happy, scared, sad and angry emoji than men. However, there were no gender differences in the interpretation of surprised and disgusted emoji.

– What I found most interesting and surprising is that there are so many individual differences in how people interpret these emojis, says Dr. Ruth Filik. We should keep these differences in mind when using emojis in our messages.

Younger people scored better

Later, the research team decided to follow up by recruiting 270 people from the UK and 253 from China, aged between 18 and 84, and having them do a similar test of emoticons. Again, the researchers saw a gender difference, but also an age difference. Younger people were better at matching emoji to the right emotion more often than older people. Even the British interpreted the emoji as the researchers labeled them better than the Chinese.

– For example, if Chinese participants use a smiling emoji to indicate they are being sarcastic, then they may be less likely to label it as ‘happy’ than UK participants.

The researchers suggest that this may be because small digital pictograms used to express an emotion or idea can be ambiguous and perceived differently by different people. This ambiguity is worthy of further research, especially “when communicating across gender, age, or culture”.

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Study: Fluoride in drinking water may impact children’s cognitive ability

Published 23 March 2025
– By Editorial Staff
According to the study, higher fluoride levels in pregnant women were linked to impaired cognitive abilities in their children at the ages of five and ten.

A study from Karolinska Institutet links fluoride in drinking water to impaired cognition in children. In particular, the researchers saw a negative impact on children’s verbal abilities.

In Sweden, fluoride is found naturally in low levels in drinking water, while in several countries, such as the United States, Canada and Australia, it is added to municipal water to prevent tooth decay. It is also used in toothpaste to protect teeth against decay.

Researchers at the Karolinska Institutet have investigated how early exposure to fluoride affects children’s cognitive abilities. The study involved 500 mothers and their children in rural Bangladesh, where fluoride is naturally present in drinking water at levels comparable to Sweden. The researchers measured fluoride levels in the mothers during pregnancy and later in the children via urine samples. The children’s cognitive abilities were then tested by psychologists at ages five and ten.

The study, published in Environmental Health Perspectives, found that higher fluoride levels in pregnant women were linked to impaired cognitive abilities in their children at ages five and ten. The impact was most evident on children’s verbal comprehension and their ability to interpret and process sensory input. In contrast, the researchers found no statistically significant link between fluoride levels in the urine of five-year-olds and their cognition.

–  This could be due to the shorter exposure, but also because the measurements are not as reliable in younger children due to greater variations in how fluoride is absorbed and accumulated in the body, especially in the skeleton, says Maria Kippler, associate professor at the Institute of Environmental Medicine at Karolinska Institutet, in a press release.

Even low levels can have negative effects

The fluoride levels that were linked to poorer cognitive development were below the WHO and EU limits for drinking water. However, the researchers point out that toothpaste is rarely a significant source of exposure, as it is not intended to be swallowed, but emphasize the importance of children learning to spit it out.

Our results support the hypothesis that even relatively low levels of fluoride can have negative effects on children’s early development, says Kippler.

However, the researchers emphasize that this is an observational study and therefore no firm conclusions can be drawn about cause and effect. It is therefore important to assess the overall results of several similar studies.

– Further research is important to inform the assessment of appropriate fluoride limits. Even small changes in cognition at the population level can have large consequences for public health, says Kippler.

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.

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