Earth

Scientists from the University of Exeter studied how guppies behaved in various situations, and found complex differences between individuals.

The researchers tested whether differences could be measured on a "simple spectrum" of how risk-averse or risk-prone guppies were. But they found variations between individuals were too complicated to be described in this way.

BIRMINGHAM, Ala. - A major health problem in older people is age-associated osteoporosis -- the thinning of bone and the loss of bone density that increases the risk of fractures. Often this is accompanied by an increase in fat cells in the bone marrow.

Washington, DC - Sept. 22, 2017 - Antibiotic use on people or pets, and use of biocidal cleaning products such as bleach, are associated with multidrug resistance in methicillin-resistant Staphylococcus aureus (MRSA) in the home. This contamination of the home environment may contribute to reinfection of both humans and animals with MRSA, and to subsequent failure of treatment. The research is published September 22nd in Applied and Environmental Microbiology, a journal of the American Society for Microbiology.

WASHINGTON, D.C., September 22, 2017 -- Pure diamond consists of carbon atoms in a perfect crystal lattice. But remove a few carbons and swap some others for nitrogen, and you get a diamond with special quantum-sensing properties. These properties are useful for quantum information applications and sensing magnetic fields, and as a platform for probing the mysteries of quantum physics.

Fires that span across the Northern Territory and Western Australia appear to have broken out in areas that have already been burned in previous fires. Areas that sport "burn scars", those areas that are a darker, almost red-brown color, are surrounded by fires that are anywhere from a few hours old to 7 days old. The areas that are seven days old can be attributed to fires that spread but areas that are just a few hours old may be fires that have presumably been put out only to have them break out again.

When the strong winds that circle the Arctic slacken, cold polar air can escape and cause extreme winter chills in parts of the Northern hemisphere. A new study finds that these weak states have become more persistent over the past four decades and can be linked to cold winters in Russia and Europe. It is the first to show that changes in winds high up in the stratosphere substantially contributed to the observed winter cooling trend in northern Eurasia.

When Zika first buzzed into the continental United States during the 2016 outbreak, Florida was hit first--and hardest--with 1,174 documented cases to date. So, when Marco Ajelli, associate research scientist at Northeastern and an expert in infectious disease modeling, wanted to study how time spent outside might affect the spread of the epidemic, he chose to focus on the state's most stricken county: Miami-Dade.

What Ajelli found was that the amount of time people spend outdoors impacts their risk for contracting the Zika virus.

Most U.S. Zika infections happen outdoors

Think of the relationship between plants and pollinators as a dance -- one that has been taking place, and evolving, for millennia. The importance of this dance is enormous. Pollination from bees (and birds, bats, butterflies, moths, beetles, and other animals) is necessary for the successful reproduction of a great number of plants, while pollinators gain sustenance to give birth to their next generations. These relationships support our natural ecosystems, as well as our cultivated ones, as an incredible amount of food crops worldwide depend on plant-pollinator interaction success.

Hurricane Maria has caused catastrophic flooding in Puerto Rico and left a wake of heavy rainfall that NASA measured using a fleet of satellites in space. NASA satellite imagery also saw Maria's eye close up as it tracked across Puerto Rico and re-open after its exit.

Calculating Maria's Rainfall

(Boston) - Stronger alcohol policies, including taxes and sales restrictions, have been shown to reduce the likelihood of alcohol involvement among homicide victims, according to a new study from Boston Medical Center (BMC) and Boston University. The study, published online in the Journal of Studies on Alcohol and Drugs, supports the importance of alcohol control policies to reduce violence, including homicide.