CAMBRIDGE, Mass. -- The must-have gift for young female chimpanzees this holiday season might be in the Christmas tree, not under it. That's the finding of scientists at Harvard University and Bates College, who say female chimpanzees appear to treat sticks as dolls, carrying them around until they have offspring of their own. Young males engage in such behavior much less frequently. The new work by Sonya M. Kahlenberg and Richard W. Wrangham, described this week in the journal Current Biology, provides the first suggestive evidence of a wild non-human species playing ...

RICHLAND, Wash. – Meteorological equipment typically used to monitor storms could help power grid operators know when to expect winds that will send turbine blades spinning, as well as help them avoid the sudden stress that spinning turbines could put on the electrical grid. "We know that the wind will blow, but the real challenge is to know when and how much," said atmospheric scientist Larry Berg. "This project takes an interesting approach –adapting an established technology for a new use – to find a reliable way to measure winds and improve wind power forecasts." Berg ...

Hydrologists may have a new way to study historical water conditions. By synthesizing present-day data with historical records they may be able to recreate broad hydrologic trends on a regional basis for periods from which scant data is available. Lack of reliable historical data can impede hydrologists' understanding of the current state of waterways and their ability to make predictions about the future. That was the case for the rivers of the northeastern United States between 1600 and 1800, a period that runs from just before the first European settlers arrived ...

The face of a doll is clearly not human; the face of a human clearly is. Telling the difference allows us to pay attention to faces that belong to living things, which are capable of interacting with us. But where is the line at which a face appears to be alive? A new study published in Psychological Science, a journal of the Association for Psychological Science, finds that a face has to be quite similar to a human face in order to appear alive, and that the cues are mainly in the eyes. Several movies have tried and failed to generate lifelike animations of humans. ...

A new study on biological invasions based on extensive data of alien species from 10 taxonomic groups and 28 European countries has shown that patterns of established alien species richness are more related to historical levels of socio-economic drivers than to contemporary ones. An international group of 16 researchers reported the new finding this week in the Proceedings of the National Academy of Sciences of the United States of America (PNAS). The publication resulted from the three-year project DAISIE (Delivering Alien Invasive Inventory for Europe, www.europe-aliens.org), ...

Phnom Penh, Cambodia (21 December, 2010) – Despite Cambodia's remarkable history in driving down HIV infections, a report released today on the future of AIDS in the country argues that future success is not guaranteed and the government needs to focus increasingly on wise prevention tactics and assume more of the financing of its AIDS program. The report, called The Long-Run Costs and Financing of HIV/AIDS in Cambodia, written by Cambodian experts working closely with staff of the Results for Development Institute (R4D), based in Washington, D.C., finds that Cambodia, ...

A new study from NASA's Chandra X-ray Observatory tells scientists how often the biggest black holes have been active over the last few billion years. This discovery clarifies how supermassive black holes grow and could have implications for how the giant black hole at the center of the Milky Way will behave in the future. Most galaxies, including our own, are thought to contain supermassive black holes at their centers, with masses ranging from millions to billions of times the mass of the Sun. For reasons not entirely understood, astronomers have found that these ...

In the latest of a series of related papers, researchers at the University of California, San Diego School of Medicine, with colleagues in Austria and elsewhere, present a new and more definitive explanation of how fibrotic cells form, multiply and eventually destroy the human liver, resulting in cirrhosis. In doing so, the findings upend the standing of a long-presumed marker for multiple fibrotic diseases and reveal the existence of a previously unknown kind of inflammatory white blood cell. The results are published in this week's early online edition of the Proceedings ...

(Santa Barbara, Calif.) –– An interdisciplinary team of researchers at UC Santa Barbara has produced a groundbreaking study of how nanoparticles are able to biomagnify in a simple microbial food chain. "This was a simple scientific curiosity," said Patricia Holden, professor in UCSB's Bren School of Environmental Science & Management and the corresponding author of the study, published in an early online edition of the journal Nature Nanotechnology. "But it is also of great importance to this new field of looking at the interface of nanotechnology and the environment." Holden's ...

Fast-moving objects create blurry images in photography, and the same challenge exists when scientists observe cellular interactions within tissues constantly in motion, such as the breathing lung. In a recent UCSF-led study in mice, researchers developed a method to stabilize living lung tissue for imaging without disrupting the normal function of the organ. The method allowed the team to observe, for the first time, both the live interaction of living cells in the context of their environment and the unfolding of events in the immune response to lung injury. The finding ...

Möbius symmetry, the topological phenomenon that yields a half-twisted strip with two surfaces but only one side, has been a source of fascination since its discovery in 1858 by German mathematician August Möbius. As artist M.C. Escher so vividly demonstrated in his "parade of ants," it is possible to traverse the "inside" and "outside" surfaces of a Möbius strip without crossing over an edge. For years, scientists have been searching for an example of Möbius symmetry in natural materials without any success. Now a team of scientists has discovered Möbius symmetry in ...

In notable back-to-back papers appearing in the prestigioous journal Science in October, teams of researchers, one led by Nora Besansky, a professor of biological sciences and a member of the Eck Institute for Global Health at the University of Notre Dame, provided evidence that Anopheles gambiae, which is one of the major mosquito carriers of the malaria parasite in Sub-Saharan Africa, is evolving into two separate species with different traits. Another significant study appearing in this week's edition of the Proceedings of the National Academy of Sciences (PNAS) and ...

Jake Beaulieu, a postdoctoral researcher the Environmental Protection Agency in Cincinnati, Ohio, who earned his doctorate at the University of Notre Dame, and Jennifer Tank, Galla Professor of Biological Sciences at the University, are lead authors of new paper demonstrating that streams and rivers receiving nitrogen inputs from urban and agricultural land uses are a significant source of nitrous oxide to the atmosphere. Nitrous oxide is a potent greenhouse gas that contributes to climate change and the loss of the protective ozone layer. Nitrogen loading to river networks ...

VIDEO: BYU nutritionist Tory Parker talks about his study into why oranges are so good for you. Click here for more information. Provo, Utah - In time for Christmas, BYU nutritionists are squeezing all the healthy compounds out of oranges to find just the right mixture responsible for their age-old health benefits. The popular stocking stuffer is known for its vitamin C and blood-protecting antioxidants, but researchers wanted to learn why a whole orange is better for ...

Vanderbilt University researchers may have found a clue to the blues that can come with the flu – depression may be triggered by the same mechanisms that enable the immune system to respond to infection. In a study in the December issue of Neuropsychopharmacology, Chong-Bin Zhu, M.D., Ph.D., Randy Blakely, Ph.D., William Hewlett, M.D., Ph.D., and colleagues activated the immune system in mice to produce "despair-like" behavior that has similarities to depression in humans. "Many people exhibit signs of lethargy and depressed mood during flu-like illnesses," said Blakely, ...

Researchers at Vanderbilt University have "engineered" a mouse that can run on a treadmill twice as long as a normal mouse by increasing its supply of acetylcholine, the neurotransmitter essential for muscle contraction. The finding, reported this month in the journal Neuroscience, could lead to new treatments for neuromuscular disorders such as myasthenia gravis, which occurs when cholinergic nerve signals fail to reach the muscles, said Randy Blakely, Ph.D., director of the Vanderbilt Center for Molecular Neuroscience. Blakely and his colleagues inserted a gene into ...

MANHATTAN, KAN. -- A Kansas State University professor is part of a national research team that discovered that streams and rivers produce three times more greenhouse gas emissions than estimated by the Intergovernmental Panel on Climate Change. Through his work on the Konza Prairie Biological Station and other local streams, Walter Dodds, university distinguished professor of biology, helped demonstrate that nitrous oxide emissions from rivers and streams make up at least 10 percent of human-caused nitrous oxide emissions -- three times greater than current estimates ...

It's long been accepted by biologists that environmental factors cause the diversity—or number—of species to increase before eventually leveling off. Some recent work, however, has suggested that species diversity continues instead of entering into a state of equilibrium. But new research on lizards in the Caribbean not only supports the original theory that finite space, limited food supplies, and competition for resources all work together to achieve equilibrium; it builds on the theory by extending it over a much longer timespan. The research was done by Daniel Rabosky ...

BIRMINGHAM, Ala. – Less-invasive robotic surgery for upper airway and digestive track malignant tumors is as effective as other minimally invasive surgical techniques based on patient function and survival, according to University of Alabama at Birmingham researchers. Head and neck squamous cell carcinomas account for about 4 percent of malignant tumors diagnosed in the United States each year. Currently the standard minimally invasive surgery for these tumors is transoral laser microsurgery. Previous studies have shown that the robotic surgery was better for patients ...

What goes in must come out, a truism that now may be applied to global river networks. Human-caused nitrogen loading to river networks is a potentially important source of nitrous oxide emission to the atmosphere. Nitrous oxide is a potent greenhouse gas that contributes to climate change and stratospheric ozone destruction. It happens via a microbial process called denitrification, which converts nitrogen to nitrous oxide and an inert gas called dinitrogen. When summed across the globe, scientists report this week in the journal Proceedings of the National Academy ...

Increasing acidity in the sea's waters may fundamentally change how nitrogen is cycled in them, say marine scientists who published their findings in this week's issue of the journal Proceedings of the National Academy of Sciences (PNAS). Nitrogen is one of the most important nutrients in the oceans. All organisms, from tiny microbes to blue whales, use nitrogen to make proteins and other important compounds. Some microbes can also use different chemical forms of nitrogen as a source of energy. One of these groups, the ammonia oxidizers, plays a pivotal role in determining ...

VIDEO: Malaria-infected red blood cells can be 50 times stiffer and have surface changes that disrupt the smooth flow of blood, depriving the brain and other organs of nutrients and oxygen.... Click here for more information. PROVIDENCE, R.I. [Brown University] — Although the incidence of malaria has declined in all but a few countries worldwide, according to a World Health Organization report earlier this month, malaria remains a global threat. Nearly 800,000 people ...

More effective risk-adjusted chemotherapy and sophisticated patient monitoring helped push cure rates to nearly 88 percent for older adolescents enrolled in a St. Jude Children's Research Hospital acute lymphoblastic leukemia (ALL) treatment protocol and closed the survival gap between older and younger patients battling the most common childhood cancer. A report online in the December 20 edition of the Journal of Clinical Oncology noted that overall survival jumped 30 percent in the most recent treatment era for ALL patients who were age 15 through 18 when their cancer ...

EAST LANSING, Mich. — Nitrous oxide, a potent greenhouse gas, has increased by more than 20 percent over the last century, and nitrogen in waterways is fueling part of that growth, according to a Michigan State University study. Based on this new study, the role of rivers and streams as a source of nitrous oxide to the atmosphere now appears to be twice as high as estimated by the Intergovernmental Panel on Climate Change, according to Stephen Hamilton, a professor at MSU's Kellogg Biological Station. The study appears in the current issue of the Proceedings of the Academy ...

VIDEO: A new breathing therapy reduces panic and anxiety by reversing hyperventilation. The breakthrough "CART " treatment, developed by SMU psychologist Alicia E. Meuret, worked better than traditional cognitive therapy at altering... Click here for more information. A new treatment program teaches people who suffer from panic disorder how to reduce the terrorizing symptoms by normalizing their breathing. The method has proved better than traditional cognitive ...