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137,606 articles from ScienceDaily

Breast Reduction Surgeries Provide Health Benefits For Smaller Women

Smaller-framed women reap significant health and quality-of-life benefits from breast reductions that involve the removal of under 500 grams of tissue per breast, according to a first-of-its-kind study. The finding runs counter to the policies of most U.S. health insurance companies, who typically do not reimburse women for these smaller mammoplasties because insurance companies deem them to be...

Bright Tumors Mean Dim Prospects

It doesn't matter how small or large it is, if a cervical tumor glows brightly in a PET scan, it's apt to be more dangerous than dimmer tumors. That's the conclusion of a new study of cervical cancer patients. The researchers showed that patients who had a high tumor SUV were more likely to have aggressive disease: They were likely to have cancerous cells in their lymph nodes, persistent disease...

DNA Analysis Shows True Dispersal Of Protozoa

In contrast to previous findings, it seems that the global distribution of macro- and microorganisms might be similar. A new study shows that some protozoa are globally dispersed, while others are geographically restricted -- by looking at a new fast-evolving DNA marker. The study also reveals that the biodiversity of protozoa may be much higher than previously realized.

Doctors May Need Support To Cope With Patient Death

Doctors could benefit from support to help them cope with the trauma of patient death, says a psychologist speaking at the death, dying and disposal conference. In preliminary work, researchers carried out detailed interviews with eight US physicians about their experiences of death. Half of those she spoke to wept as they recounted stories of traumatic death they had experienced as physicians,...

Early Star Formation In The Universe Illuminated

A groundbreaking study has provided new insight into the way the first stars were formed at the start of the universe, some 13 billion years ago. Cosmologists suggest that the formation of the first stars depends crucially on the nature of "dark matter," the strange material that makes up most of the mass in the universe.

Emergency Preparedness Tools May Enable Millions More People To Shelter In Place

Although the nation has invested billions of dollars preparing to respond to emergencies, current plans leave millions of Americans at risk because they do not account for critical problems people face when they actually try to protect themselves. To fix this fundamental flaw a new report and tools that will enable households, work places, schools and early childhood/youth programs, and...

Fat Mum Hastens Path To Childhood Obesity

A fat mother hastens a child's path to obesity, finds a new study. Other factors included too much time spent in front of the TV and rapidly piling on the pounds in early childhood. Children who had acquired a high percentage body fat by the age of 3½ were significantly more likely to be obese at the age of 7 than those with low percentage body fat.

Fossil Whale Puts Limit On Origin Of Oily, Buoyant Bones In Whales

When a whale dies and falls to the bottom in the deep ocean, it attracts a weird community of mollusks, crabs and worms that feed on its oil-rich bones. A 15 million-year-old fossilized whale discovered on Año Nuevo Island is the first fossil whale fall discovered in California, and one of the youngest and most complete fossil whale falls ever found. It shows that whale-fall organisms look for...

Good Fences Make Good Neighbors

In the last century, more than 100 million people have perished in violent conflict, very often because of local clashes between ethnically or culturally distinct groups. In a novel study in Science, researchers report on a mathematical model that can predict where ethnic conflict will erupt.

Hospital Bugs Get From Bottom To Bedrail

The presence of the bacterium Staphylococcus aureus (S. aureus) in patients' stools increases the likelihood that it will make its way onto skin, hospital bed rails and other surfaces, according to new research in BMC Infectious Diseases. The study's most important finding was that patients harbouring S. aureus in both their intestines and noses were significantly more likely than those with this...

How To Isolate Stem Cells In Womb Tissue

Scientists have found a way of identifying probable stem cells in the lining of women's wombs. The finding opens up the possibility of using the stem cells for tissue engineering applications such as building up natural tissue to repair prolapsed pelvic floors.

Less Than Three Percent Of UK 11-year-olds Get Enough Exercise

Less than 3 percent of UK 11-year-olds are taking enough exercise, according to new research. It is recommended that kids spend at least an hour a day doing some form of moderate to vigorous physical activity, in a bid to promote good health and stave off the risks of subsequent obesity and diabetes. Boys were more physically active than girls, and they were also more likely to engage in moderate...

Loneliness Is A Molecule

Changes in the immune system may explain why social factors like loneliness are linked to an increased risk of heart disease, viral infections and cancer. It's already known that a person's social environment can affect their health, with those who are socially isolated--that is, lonely suffering from higher mortality than people who are not. Now researchers have identified a distinct pattern of...

Macho Advertisements Are Putting Feminine Men Off Products, Research Says

Marlboro Man, or his current macho billboard equivalent, is putting off metrosexuals from buying products, research shows. A new study shows that men with characteristics such as sensitivity and tenderness are put off products promoted by advertisements featuring squared-jawed hunks, preferring those featuring more feminine looking male models instead.

Marrying Natural And Social Sciences For Mother Earth's Sake

No one says marriage is easy -- but an international group of 16 natural scientists and social scientists are saying the wedding of natural sciences and social sciences is called for. There was a problem, for example, in Wisconsin, where indigenous populations compete with recreation. Smelt was introduced as a food source for game fish like walleye. The plan backfired when the smelt gobbled the...

Men Shed Light On The Mystery Of Human Longevity, Study Finds

It turns out that older men chasing younger women contributes to human longevity and the survival of the species, according to new findings. Human ability to scale the so-called "wall of death"—surviving beyond the reproductive years—has been a center of scientific controversy for more than 50 years.

MIT IDs Binocular Vision Gene

In work that could lead to new treatments for sensory disorders in which people experience the strange phenomena of seeing better with one eye covered, researchers report that they have identified the gene responsible for binocular vision.

Nanomaterials With A Bright Future

An innovative and inexpensive way of making nanomaterials on a large scale has resulted in novel forms of advanced materials that pave the way for exceptional and unexpected optical properties. The new fabrication technique, known as soft lithography, or SIL, offers many significant advantages over existing techniques, including the ability to scale-up the manufacturing process to produce devices...

NASA Keeps Eye On Ozone Layer Amid Montreal Protocol's Success

NASA scientists will join researchers from around the world to celebrate the 20th anniversary of the Montreal Protocol, an international treaty designed to reduce the hole in Earth's protective ozone layer. NASA scientists study climate change and research the timing of the recovery of the ozone layer.

Nicotine May Accelerate Atherosclerosis, May Be As Dangerous As Tar

It's well known that smoking cigarettes increases risk for a host of serious health problems from cancer to heart disease. Now a new study looks at how they do their dirty work by contributing to atherosclerosis, or hardening of the arteries. The evidence points to nicotine, the addictive chemical in cigarettes.

Nuclear Physicists Examine Oxygen's Limits

Physicists have made a unique measurement of an exotic oxygen nucleus, leading scientists one step closer to deciphering the behavior of the element at its limits of existence. The finding confirms a relatively new theoretical model that predicts dramatic changes in structure as one looks at heavier and heavier oxygen nuclei.

Oldest Stars May Shed Light On Dark Matter

The universe's earliest stars may hold clues to the nature of dark matter, the mysterious stuff that makes up most of the universe's matter but doesn't interact with light, cosmologists report. The first stars in an early universe filled with moderately energetic, or "warm," dark matter would probably have developed in long strings, according to a study in journal Science. In contrast, simulations...