922,029 articles

Mercury mineral evolution

Mineral evolution posits that Earth's near-surface mineral diversity gradually increased through an array of chemical and biological processes. A dozen different species in interstellar dust particles that formed the solar system have evolved to more than 4500 species today. New work from Carnegie's Bob Hazen demonstrates that the creation of most minerals containing mercury is fundamentally...

Mystery of the flatfish head solved

A new discovery described in the latest issue of the Journal of Vertebrate Paleontology by Oxford University researcher Dr Matt Friedman describes a fossil fish, named Heteronectes (meaning "different swimmer") that was found in 50 million year old marine rocks from northern Italy. This study provides the first detailed description of a primitive flatfish, revealing that the migrated eye had not...

NASA sees Tropical Storm Debby's clouds blanket Florida

Like a white blanket, Tropical Storm Debby's clouds covered the entire state of Florida in a NASA satellite image. Two satellites have captured imagery that shows Tropical Storm Debby has thrown a large white blanket of clouds over the state of Florida, and it doesn't seem like that blanket is going to lift quickly as Debby moves slowly north.

New evidence links ozone exposure to potential heart attacks

Young, healthy adults exposed to ozone for two hours developed changes in their cardiovascular system which could explain a possible link between ozone exposure and death. Exposure to ozone, along with particulate matter (tiny airborne particles inhaled into the lungs), may be a major cause of the two million annual acute air pollution deaths worldwide.

Prions and cancer: A story unfolding

Prions, the causal agents of mad cow and other diseases, are very unique infectious particles. In a paper published in the Journal of Biological Chemistry, researchers in Brazil present new evidence that a prion-like behavior may be responsible for tumor formation and progression. The new finding may dramatically transform our way of thinking of cancer and treating cancer patients.

Rate of severe reactions higher than thought in young children with food allergies

Young children with allergies to milk and egg experience reactions to these and other foods more often than researchers had expected, a study reports. The study also found that severe and potentially life-threatening reactions in a significant number of these children occur and that some caregivers are hesitant to give such children epinephrine, a medication that reverses the symptoms of such...

Remapping gang turf: Math model shows crimes cluster on borders between rivals

A mathematical model that has been used for more than 80 years to determine the hunting range of wild animals holds promise for mapping the territories of street gangs, a UCLA-led team of social scientists reports in a new study. "The way gangs break up their neighborhoods into unique territories is a lot like the way lions, chimpanzees or honey bees break up space," said author P. Jeffrey...

Removing estrogen from drinking water

A biological filter to remove estrogen from waste water and drinking water. The 15 Bielefeld students submitting this project to the International Genetically Engineered Machine Competition at the Massachusetts Institute of Technology in Boston, USA, are setting their sights high. Since May, they have been spending their free time in the laboratory making new DNA building blocks, reproducing them,...

Romancing the firefly

While a female firefly's initial assessment of potential mates is based on males' luminescent flashes, once a pair makes physical contact, sexy flashes no longer matter. Instead, it's males that have larger nuptial gifts (a protein-packed sperm package that helps females produce more eggs) that mate more often and father more offspring.

Scientists struggle with mathematical details

Many people remember struggling with maths at school, but few of us would expect that professional scientists suffer from a similar problem in their daily work. A new study by biologists at the University of Bristol shows that scientists tend to overlook their colleagues' research if it is packed full of mathematical equations.

Scientists twist light to send data

A multi-national team led by USC with researchers hailing from the US, China, Pakistan and Israel has developed a system of transmitting data using twisted beams of light at ultra-high speeds -- up to 2.56 terabits per second.

Severe reactions to food more common than thought in young children

Young children with allergies to milk and egg experience an unexpectedly high number of reactions to these and other foods, according to researchers at National Jewish Health. More than 70 percent of preschool children with documented or suspected food allergies suffered a significant reaction during the three-year period. Researchers also found that caregivers failed to administer the medication...

STOP Obesity Alliance new state-level members share obstacles, opportunities in addressing obesity

The STOP Obesity Alliance today released a new bulletin for state leaders that offers information on ways to integrate obesity into a state's essential health benefits package. The release of the latest "Weight and the States" bulletin coincides with the formation of the Alliance's new State-Level Member group, organized to provide a forum for state health leaders to share information and insights...

Study finds race has an impact on both enrollment and disenrollment in hospice care

Although use of hospice services is increasing dramatically, a study led by Regenstrief Institute investigator Kathleen T. Unroe, M.D., MHA, an assistant research professor of medicine at the Indiana University School of Medicine, has found that nonwhite Medicare patients with heart failure are 20 percent less likely to enroll in hospice than their white counterparts.