Researchers have discovered intermediary stage embryos between early-stage animal embryos and their adult forms, shedding light on the development of Earth's first animals. The discoveries were made using microfocus X-ray computed tomography (microCT) imaging and suggest that these embryos would have grown into tubular organisms.
Researchers have discovered a drumlin, a mound of sediment and rock, actively forming and growing under the ice sheet in Antarctica. The study, using time-lapse seismic surveys, reveals the drumlin grew ten times faster than expected, providing new insights into the drag on the underside of the ice.
In promiscuous rodents, individual sperm work together in groups to increase competitiveness and successfully reach the female egg. This cooperation enables faster and stronger swimming, making them better competitors in fertilization races.
A study by Johns Hopkins Medicine suggests that brief preoperation team meetings can increase awareness of OR safety and perceptions of operating room personnel. The surveys showed a 13.2% increase in those who believed the policy would be effective and over 90% agreed that team discussions are important for patient safety.
A randomized controlled trial in Senegal shows that an intervention program with improved communication and community involvement significantly increased cure rates (88% vs 76%) and reduced default rates by nearly 60%. The program also decreased the time to defaulting from treatment.
A University of Florida-led study has determined that Titanis walleri, a prehistoric 'terror bird,' arrived in North America from South America 2 million years before the land bridge formed. The team used geochemical analysis to revise the ages of terror bird fossils, finding they were 5 million years old.
A new study by Oregon State University and the EPA found that over 600 rivers in the western US have widespread mercury contamination in fish. Piscivorous fish like bass and walleye show significantly higher levels of mercury than non-piscivore species like trout.
Researchers have discovered that spinal cord neurons show irregular firing patterns during network activity, similar to the cerebral cortex. This finding enables exploration of how spinal cords generate movements, shedding light on the complex system controlling human motion.
A new study published in the Journal of Allergy and Clinical Immunology found that inhaled corticosteroids are the most effective initial daily therapy for children with mild to moderate persistent asthma. The study also showed no significant adverse growth effects among any of the medicines studied.
A study found that older men and women have a similar and substantial risk of subsequent fracture after an initial low-trauma fracture. This highlights the importance of preventive treatment, as virtually all low-trauma fractures indicate increased risk of subsequent osteoporotic fracture, particularly in the next 5-10 years.
A major 20-year study has cast doubt on the assumption that orthodontic treatment improves psychological well-being. The study found that orthodontic treatment had little positive impact on participants' psychological health and quality of life in adulthood, contradicting widespread beliefs among dentists.
A team of Canadian researchers discovered a distinct dopamine signalling complex in the brain, which may have a significant role in understanding and treating schizophrenia. This novel target involves two different types of dopamine receptors that only create brain signals when both are stimulated at the same time.
A Brown University study finds that a single protein plays a major role in the spread of deadly prion diseases by fragmenting clusters of infectious proteins. This process could be slowed or inhibited with a drug, potentially slowing progression of diseases like Alzheimer's and Parkinson's as well.
Dartmouth researchers found that North America's prevailing winds in the mid-latitudes once blew from the east, not the west. This change was influenced by a growing and intensifying northern circumpolar vortex, resulting in shifting temperature and precipitation patterns.
A team of researchers from Yale University and other institutions have discovered two 56-million-year-old fossils, including the most primitive primate skeleton ever described. The study reconstructs the base of the primate family tree, providing evidence that plesiadapiforms are the most primitive primates.
The International Harmonization Project has developed new guidelines for assessing lymphoma treatment, providing uniform criteria for clinical trials and interpreting response to treatment. The revised guidelines incorporate PET scans and immunohistochemistry, allowing for more accurate assessment of tumor viability.
A new oral corticosteroid therapy has significantly reduced deaths from gastrointestinal graft-vs.-host disease (GVHD) in stem-cell transplant patients. The treatment, which includes a reformulated version of beclomethasone dipropionate, kept GVHD in remission and allowed patients to taper off high-dose prednisone therapy.
A new study conducted by the University of Texas at Austin found that children's age and family dynamics play a significant role in shaping weekend leisure activity choices. The study reveals that children whose fathers have a higher education level are more likely to engage in active recreation, while those from single-parent househol...
A recent study published in PLOS ONE found that antiretroviral resistance testing significantly improves life expectancy and quality of life for HIV patients. The study also revealed cost savings for society, including reduced healthcare costs and increased productivity.
Researchers developed a novel virus culture system that enables sustained replication and production of HCV particles in nontransformed hepatocytes. This breakthrough allows for better understanding of HCV differences between strains and may improve treatment strategies.
Researchers at Georgetown University Medical Center found that young cancer survivors are at risk of developing unhealthy behaviors, including smoking, lack of exercise, and inadequate sun protection. The study suggests that these behaviors can increase the risk of cancer recurrence and chronic disease in adulthood.
UCSB is part of a $12.5M DARPA-funded consortium researching robust uncertainty management in large networks with complex dynamics. The project aims to develop techniques for predicting the consequences of events like power grid blackouts and improving decision-making under uncertainty.
Researchers successfully control rotation of axel-mounted molecular wheel, marking major breakthrough in creating molecular machines. The achievement opens up new possibilities for technological advancements and understanding at the molecular scale.
Scientists discovered that bony fish duplicated their yolk-producing genes, allowing eggs to fill with water and float. This post-R3 lineage-specific gene duplication enabled hydration of maturing eggs, driving the evolution and success of marine teleosts in the oceanic environment.
Scientists have created highly efficient infrared light-emitting diodes (LEDs) that can be used in night-vision devices, emitting a reddish-orange glow. The LEDs use a phosphorescent platinum porphyrin complex as a doping agent to improve efficiency and emit light for longer periods.
A study published in JAMA found that citalopram was superior to placebo in reducing depressive symptoms in patients with coronary artery disease. The treatment also improved perceived social support and daily function.
A study by UC Irvine scientists found that short but repeated learning sessions can slow the development of two brain lesions associated with Alzheimer's disease. The findings suggest that stimulating the mind through activities like reading or crossword puzzles may help delay and/or prevent the disease in senior citizens.
A new study conducted at NYU Medical Center found that lap band surgery is an effective procedure for combating obesity in adolescents. Patients who underwent the surgery lost approximately 50% of their excess weight within a year, with no significant complications.