News Articles

University of Minnesota researchers have answered a key question as to why antiretroviral therapy isn't effective in restoring immunity in HIV-infected patients.
Once a person is infected with the virus, fibrosis, or scarring, occurs in the lymph nodes – the home of T cells that fight infection. And once fibrosis occurs, T cells can't repopulate the lymph nodes when HIV therapy begins, said Timothy Schacker, M.D., professor of medicine and principal investigator on the study.

Globular star clusters, dense bunches of hundreds of thousands of stars, contain some of the oldest surviving stars in the Universe. A new international study of globular clusters outside our Milky Way Galaxy has found evidence that these hardy pioneers are more likely to form in dense areas, where star birth occurs at a rapid rate, instead of uniformly from galaxy to galaxy.
Astronomers used the NASA/ESA Hubble Space Telescope to identify over 11 000 globular clusters in the Virgo cluster of galaxies, most of which are more than 5 billion years old. Comprised of over 2 000 galaxies, the Virgo cluster is located about 54 million light-years away and is the nearest large galaxy cluster to Earth. Along with Virgo, the sharp vision of Hubble's Advanced Camera for Surveys (ACS) resolved the star clusters in 100 galaxies of various sizes, shapes, and brightness – even in faint, dwarf galaxies.

You may have laughed when you read in history books that in years gone by maggots were used to cure disease.
Laugh no more. It’s not uncommon for someone to suffer from chronic infected wounds for 18 months, despite all sorts of conventional treatment, but when maggots are applied to the same wound they can often begin to clear infection in just a few days. They have even been known to save people from having limbs amputated.
MRSA infections cause suffering, amputations and death, not to mention the estimated £1 billion cost to the NHS. Between 2002 and 2006, 6,201 deaths in England and Wales involved MRSA and 15,683 deaths in England and Wales involved C. difficile. The rapid rise in antibiotic-resistant bacteria means that scientists urgently need to find a solution.

A study published in the International Journal of Obesity says that eating two eggs for breakfast, as part of an overall reduced-calorie diet, helps overweight adults lose more weight and feel more energetic than those who eat a bagel breakfast of equal calories.(1) This study supports previous research, published in the Journal of the American College of Nutrition, which showed that people who ate eggs for breakfast felt more satisfied and ate fewer calories at the following meal. (2)

Metabolic changes responsible for the evolution of our unique cognitive abilities indicate that the brain may have been pushed to the limit of its capabilities, according to research published today in Genome Biology.
This adds weight to the theory that schizophrenia is a costly by-product of human brain evolution.
Philipp Khaitovich, from the Max Planck Institute for Evolutionary Anthropology and the Shanghai branch of the Chinese Academy of Sciences, led a collaboration of researchers from Cambridge, Leipzig and Shanghai who investigated brains from healthy and schizophrenic humans and compared them with chimpanzee and rhesus macaque brains.

The first thing iRobot Corporation wants you to know, because they have been asked so many times, is that the Packbot is no Terminator - and never will be.
Robots in the military are not the stuff of science fiction but their mission parameters are very specific - and they are all teleoperated, meaning that there is someone operating the robot from a remote location, perhaps with a joystick and a computer screen.
While this may seem like a caveat in plans to add robots to the military, it is actually very important to keep humans involved in the robotic operations.

A revised outlook for the Arctic 2008 summer sea ice minimum shows ice extent will be below the 2005 level but not likely to beat the 2007 record, say researchers with DAMOCLES (Developing Arctic Modeling and Observing Capabilities for Long-term Environmental Studies), an integrated ice-atmosphere-ocean monitoring and forecasting system designed for observing, understanding and quantifying climate changes in the Arctic.
DAMOCLES will dispatch eleven research missions into the Arctic this autumn to better understand the future of the sea ice.
Chances that the 2008 ice extent will fall below last year's record minimum is about 8 percent, researchers forecast after having run a number of different models predicting the fate of the Arctic sea ice this summer. But there is still reason for concern; the scientists are almost certain the ice extent will fall below the minimum of 2005, which was the second lowest year on record. With a probability of 80% the minimum ice extent in 2008 will be in the range between 4.16 and 4.70 million km2.

You no longer need a snooty wine expert to identify a ’74 Pinot Noir from Burgundy – a handheld “electronic tongue” devised by European scientists will tell you the grape variety and vintage at the press of a button.
Designed for quality control in the field, the device is made up of six sensors which detect substances characteristic of a certain wine variety. Components such as acid, sugar and alcohol can be measured by this detection, and from these parameters it can determine the age and variety of the wine.
The tongue was invented by Cecilia Jiménez-Jorquera and colleagues from the Barcelona Institute of Microelectronics, Spain, and is reported in the Royal Society of Chemistry journal The Analyst.

Tiny fossilized teeth excavated from an Indian open-pit coal mine could be the oldest Asian remains ever found of anthropoids, the primate lineage of today's monkeys, apes and humans, say researchers from Duke University and the Indian Institute of Technology.
Just 9-thousandths of a square inch in size, the teeth are about 54.5 million years old and suggest these early primates were no larger than modern dwarf lemurs weighing about 2 to 3 ounces. Studies of the shape of the teeth suggest these small animals could live on a fruit and insect diet, according to the researchers.
"It's certainly the oldest anthropoid from Asia and India," said Richard Kay, a Duke professor of evolutionary anthropology who is corresponding author of a report in Proceedings of the National Academy of Sciences (PNAS).

Researchers at the University of Birmingham say they have uncovered new information about the way that we perceive fast moving, incoming objects – such as tennis or cricket balls.
The new research, published today in PNAS, studies why the human brain has difficulty perceiving fast moving objects coming from straight ahead; something that should be a key survival skill. The research has implications for understanding how top-class sportspeople make decisions about playing a shot but could also be important for improving road safety and for the development of robotic vision systems.

High-dose injections of vitamin C, also known as ascorbate or ascorbic acid, reduced tumor weight and growth rate by about 50 percent in mouse models of brain, ovarian, and pancreatic cancers, researchers from the National Institutes of Health (NIH) report in the August 5, 2008, issue of the Proceedings of the National Academy of Sciences. The researchers traced ascorbate's anti-cancer effect to the formation of hydrogen peroxide in the extracellular fluid surrounding the tumors. Normal cells were unaffected.
Natural physiologic controls precisely regulate the amount of ascorbate absorbed by the body when it is taken orally. "When you eat foods containing more than 200 milligrams of vitamin C a day--for example, 2 oranges and a serving of broccoli--your body prevents blood levels of ascorbate from exceeding a narrow range," says Mark Levine, M.D., the study's lead author and chief of the Molecular and Clinical Nutrition Section of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), part of the NIH.

Dartmouth researchers writing in the journal Pediatrics have documented what they say are alarming numbers of young adolescents (age 10-14) who are exposed to graphic violence in movies rated R for violence. They found that these extremely violent movies were seen by an average of 12.5 percent of an estimated 22 million children age 10-14. One example, the R-rated "Scary Movie", was seen by an estimated 10 million children, or about 48 percent of 10-14 year olds.
Some scientific studies have established a connection between exposure to media violence and aggression and violence in children, including video games which some studies have said can lead to changes in attitudes and behavior as well as desensitization to actual violence.