912,155 articles

Can a single layer of cells control a leaf's size?

Ever looked carefully at the leaves on a plant and noticed their various sizes and shapes? Why are they different? What controls the size and shape of each individual leaf? Very little is known about the developmental control of leaf size and shape, and understanding the mechanisms behind this is a major issue in plant biology.

Does promiscuity prevent extinction?

Promiscuous females may be the key to a species' survival, according to new research by the Universities of Exeter and Liverpool. Published today (25 February) in Current Biology, the study could solve the mystery of why females of most species have multiple mates, despite this being more risky for the individual.

Fish can recognize a face based on UV pattern alone

Two species of damselfish may look identical -- not to mention drab -- to the human eye. But that's because, in comparison to the fish, all of us are essentially colorblind. A new study published online on February 25th in Current Biology reveals that the fish can easily tell one species from another based entirely on the shape of the ultraviolet (UV) patterns on their faces.

For better trade, give peace a chance

Liberal theorists and politicians have long argued that trade leads to peaceful relations between nations - a view that informs the push for free trade. However, many international relations experts dispute this claim. New US research out today, in the journal Conflict Management and Peace Science published by SAGE, finds that rather than trade being the driver, peace is actually the vital...

Good parenting triumphs over prenatal stress

A mother's nurture may provide powerful protection against risks her baby faces in the womb, according to a new article published online today in the journal Biological Psychiatry. The research shows that fetuses exposed to high levels of stress hormone - shown to be a harbinger for babies' poor cognitive development - can escape this fate if their mothers provide them sensitive care during...

GPS Jamming Devices Pose Many Threats (w/ Video)

(PhysOrg.com) -- The latest GPS jamming devices are now being used by car thieves in the UK to render stolen cars and trucks undetectable by law enforcement. These devices also pose a threat to airlines and US military overseas.

How health care is paid for appears to impact outcome

Whether an individual is treated for a hip fracture at a hospital reimbursed by Medicare or is treated at a Department of Veterans Affairs Medical Center makes a significant difference in what happens to the patient after release from the medical facility, according to a large study which may contribute to the ongoing debate on how to pay for health care.

Lacosamide validated as promising therapy for uncontrolled partial-onset seizures

A recent multi-center study has confirmed earlier study results that 400 mg/day of lacosamide provides a good balance of efficacy and tolerability for patients with uncontrolled partial-onset seizures (POS), and doses of 600mg/day may provide additional benefit for some patients. Researchers from the Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Thomas Jefferson...

MeCP2 goes global -- redefining the function of the Rett syndrome protein

A paper published online today in Molecular Cell proposes that Methyl CpG binding protein 2 (MeCP2) impacts the entire genome in neurons, rather than acting as a regulator of specific genes. Mutations in MeCP2 cause the autism spectrum disorder Rett Syndrome as well as some cases of neuropsychiatric problems including autism, schizophrenia and learning disabilities.

New research shows fishery management practices for beluga sturgeon must change

A first-of-its-kind study of a Caspian Sea beluga sturgeon (Huso huso) fishery demonstrates current harvest rates are four to five times higher than those that would sustain population abundance. The study's results, which will be published in an upcoming issue of the journal Conservation Biology, suggest that conservation strategies for beluga sturgeon should focus on reducing the overfishing of...

Researchers gain detailed insight into failing heart cells using new nanotechnique

Researchers have been able to see how heart failure affects the surface of an individual heart muscle cell in minute detail, using a new nanoscale scanning technique developed at Imperial College London. The findings may lead to better design of beta-blockers, the drugs that can slow the development of heart failure, and to improvements in current therapeutic approaches to treating heart failure...

Researchers measure impacts of changing climate on ocean biology

A three-year field program now underway is measuring carbon distributions and primary productivity in the Northwest Atlantic Ocean to help scientists worldwide determine the impacts of a changing climate on ocean biology and biogeochemistry. The study, Climate Variability on the East Coast (CliVEC), will also help validate ocean color satellite measurements and refine biogeochemistry models of...

The mathematics behind a good night's sleep

Why can't I fall asleep? Will this new medication keep me up all night? Can I sleep off this cold? Despite decades of research, answers to these basic questions about one of our most essential bodily functions remain exceptionally difficult to answer. In fact, researchers still don't fully understand why we even sleep at all. In an effort to better understand the sleep-wake cycle and how it can go...

UV light stick purifies water

(PhysOrg.com) -- Today, about one billion people on Earth don't have access to clean drinking water, and that number is expected to increase even more in the coming years. To solve this problem, inventors have been trying to come up with water purification methods that are easy, inexpensive, and energy-efficient. A new concept called the STER UV, which is a UV light stir stick, seems to meet each...

Video games may help combat depression in older adults

Research at the Sam and Rose Stein Institute for Research on Aging at the University of California, San Diego School of Medicine suggests a novel route to improving the symptoms of subsyndromal depression (SSD) in seniors through the regular use of "exergames" - entertaining video games that combine game play with exercise. In a pilot study, the researchers found that use of exergames...

Killer Whale's Fate Decided

In the blog for SeaWorld today, the following statement was posted about Tilikum, the orca that fatally injured trainer Dawn Brancheau yesterday: "Many people are asking about the future care of Tilikum, the whale involved in the incident. We have ...