Group

Experiments provide proof of how traveling in groups protects insects

Few events involving animals are more dramatic than when they band together and head out on the march cross-country. Among examples are the many thousands of wildebeests and other hoofed mammals that form herds and migrate across the African plains. and young locusts also sometimes unite with their...

Experiments provide proof of how traveling in groups protects insects

Few events involving animals are more dramatic than when they band together and head out on the march cross-country. Among examples are the many thousands of wildebeests and other hoofed mammals that form herds and migrate across the African plains. and young locusts also sometimes unite with their...

Flocking together: Study shows how animal groups find their way

A study led by Princeton biologists has revealed a remarkably simple mechanism that allows flocking birds, schooling fish or running herds to travel in unison without any recognized leaders or signaling system. The finding, published in the Feb. 3 issue of Nature, helps settle age-old questions about how animals coordinate their actions. Previously, scientists had looked for subtle signal...

Virginia Tech group adds tools to DNA-targeted anti-cancer drugs

Chemistry and biology researchers at Virginia Tech have enhanced the abilities of the molecules they are creating to deliver killing blows to cancer cells. The man-made molecular complexes enter cancer cells and, when signaled, deliver killing medicine or cause the cell to change. The new supermolecules have more units that will absorb light - providing more control over the range of light freque...

Group proves it's possible to grow new lung alveoli by growing new blood vessels

The good news is that medical advances in perinatal care have allowed us to save many more premature babies. The bad news is they're often at risk of developing bronchopulmonary dysplasia--a chronic lung disease caused by having to place the tiny infants on ventilators and oxygen-rich therapy for acute respiratory failure. It's really a win-lose situation: the babies are saved but they pay...

New HIV study identifies high-risk subgroups of adolescents

A new study from the Bradley Hasbro Children’s Research Center and Brown Medical School unveils profiles of adolescents at the greatest risk for HIV. Amongst a group of high-risk teens, researchers found that those at highest risk for the disease (those who engaged in the most unprotected sex acts) were mostly white males with mental health problems. Prior studies have found that risky sex...

UCLA study of community health project shows how group dynamics affect fitness, eating habits

Imagine break-room vending machines featuring fruit juice and vegetables instead of cookies and soda pop. Consider colleagues who insist on mid-morning group exercise breaks and applaud a lunchtime workout rather than criticizing the cut of the sweat suit. Ponder an organizational culture that encourages walking the stairs instead of riding the elevator. A UCLA-evaluated study of a demons...

Twenty of world's 162 grouper species threatened with extinction

The first comprehensive assessment of the world’s 162 species of grouper, a culinary favorite and important commercial fish, found that 20 are threatened with extinction unless proper management or conservation measures are introduced. Eight species previously were listed by the World Conservation Union (IUCN) as under extinction threat, and the new assessment proposes adding 12 more. A pa...

Gene study shows three distinct groups of chimpanzees

The largest study to date of genetic variation among chimpanzees has found that the traditional, geography-based sorting of chimps into three populations—western, central and eastern—is underpinned by significant genetic differences, two to three times greater than the variation between the most different human populations. In the April 2007 issue of the journal PLOS Genetics, researchers...