Researchers have developed a new mathematical model that accurately describes the evolution of ancient empires.
The computer model can predict with 65% accuracy where and when the largest complex societies arose in human history.
The research, which suggests that intense warfare is the evolutionary driver of large complex societies, is published in the journal Proceedings of the National Academy of Sciences (PNAS). It was carried out by researchers from the University of Exeter in collaboration with University of Connecticut and the National Institute for Mathematical and Biological Synthesis (NIMBioS) in the US. (more…)
ANN ARBOR — Facebook helps people feel connected, but it doesn’t necessarily make them happier, a new study shows. Facebook use actually predicts declines in a user’s well-being, according to a University of Michigan study that is the first known published research examining Facebook influence on happiness and satisfaction.
The study about the use of Facebook, a free networking website, appears online in PLOS ONE.
“On the surface, Facebook provides an invaluable resource for fulfilling the basic human need for social connection,” said U-M social psychologist Ethan Kross, lead author of the article and a faculty associate at the U-M Institute for Social Research. “But rather than enhance well-being, we found that Facebook use predicts the opposite result—it undermines it.” (more…)
Under the microscope, they look like they could be from another planet, but these microscopic organisms inhabit the depths of our oceans in nearly infinite numbers.
To begin to identify where, when, and how much oceanic plankton can be found around the globe, a group of international researchers have compiled the first ever global atlas cataloguing marine plankton ranging in size from bacteria to jellyfish. The atlas was published on July 19, 2013, in a special issue of the journal Earth System Science Data. (more…)
In the future police will be able to predict the spread of riots, and how they impact on cities, thanks to a new computer model.
Developed by researchers at UCL, the model highlights the importance of considering the layout of cities in order for police to suppress disorder as quickly as possible once a riot is in progress.
“As riots are rare events it is difficult to anticipate if and how they will evolve. Consequently, one of the main strategic issues that arose for the police during the 2011 London riots concerned when and where to deploy resources and how many officers would be required to control the disorder,” said co-author Toby Davies (UCL Security & Crime Science). (more…)
Structure of face may help predict expression of prejudice, researchers report
The structure of a man’s face may indicate his tendency to express racially prejudiced beliefs, according to new research published in Psychological Science, a journal of the Association for Psychological Science.
Studies have shown that facial width-to-height ratio (fWHR) is associated with testosterone-related behaviors, which some researchers have linked with aggression. But psychological scientist Eric Hehman of Dartmouth College and colleagues at the University of Delaware speculated that these behaviors may have more to do with social dominance than outright aggression. Hehman conducted the research while he was a graduate student at UD. (more…)
ANN ARBOR — People setting a goal to lose weight in 2013 may want to first ask themselves if diet or exercise is more important to success.
Whether a person believes obesity is caused by overeating or by a lack of exercise can predict whether he or she will gain or lose weight, according to University of Michigan research to be published in the journal Psychological Science.
With two-thirds of the adult U.S. population classified as overweight or obese and similar numbers in many developed nations, obesity has become an important health concern. (more…)
As sea ice in the Arctic continues to shrink during this century, more than two thirds of the area with sufficient snow cover for ringed seals to reproduce also will disappear, challenging their survival, scientists report in a new study.
The ringed seal, currently under consideration for threatened species listing, builds caves to rear its young in snow drifts on sea ice. Snow depths must be on average at least 20 centimeters, or 8 inches, to enable drifts deep enough to support the caves. (more…)
COLUMBIA, Mo. — Freedom of the press is viewed by many as a cornerstone of democracy. But can it actually help improve people’s lives and make them happy? Researchers at the University of Missouri have found that citizens of countries with press freedom tend to be much happier than citizens of countries without free presses. Edson Tandoc, Jr., a doctoral student in the MU School of Journalism, says that press freedom directly predicts life satisfaction across the world.
“We already know that having reliable, objective news sources can benefit democracy, but in this study, we found that press freedom also benefits communities by helping improve the overall quality of life of citizens and, in the process, by also making them happier,” Tandoc said. “People enjoy having an element of choice about where they get their news. Citizens of countries without a free press are forced to rely on the government for information, when what people really want is diversity in content where they are free to get the information they want from the source of their choosing.” (more…)
