843,143 articles

4 kinds of compulsive gamblers identified

Disorganized and emotionally unstable, poorly adapted, suffering from alcohol problems, impulsive, or with a "globally adapted" personality. These are the features of the four diagnosed types of compulsive gamblers identified by researchers at the University Hospital of Bellvitge (IDIBELL) and the Autonomous University of Barcelona (UAB). According to the scientific team, only one of these four...

A river ran through it

Humans and nature itself are making it tough on rivers to continue in their central role to support fish species, according to new research by a team of scientists, including one from Arizona State University.

Asteroid collision forensics

Scientists from the Max Planck Institute for Solar System Research use the unique perspective from the Rosetta spacecraft to put a date on impact.

Astronomer leverages supercomputers to study black holes, galaxies

Ohio State astronomer Stelios Kazantzidis leveraged the powerful resources of the Ohio Supercomputer Center to simulate and study several cosmological phenomena. His recent investigations revealed that supermassive black holes don't necessarily grow in relation to the mass of their host-galaxies when the galaxies merge, and small "disky dwarf" galaxies -- loaded with dark-matter -- often lose mass...

Biodiversity goals fall short: What can be done to avert the tragedy of the commons?

While not an outright failure, a 2010 goal set by the Convention on Biological Diversity for staunching the loss of the world's species fell far short of expectations. In the journal Science, some of the world's foremost biodiversity experts from DIVERSITAS, offer a strategic approach to the 2020 goals currently being considered. There are lots of reasons, reasonable ones, for people making...

Biomarker shows potential for early diagnosis of lung cancer

A collaboration between physicians and scientists at UNC Lineberger Comprehensive Cancer Center and the University of Texas M.D. Anderson Cancer Center has demonstrated that a biomarker called TCF21 may be used to develop a potential screening test for early-stage lung cancer.

Carbon dioxide controls Earth's temperature

Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide.

Cells able to switch genetic profile: Implications for cancer drug testing

Scientists have made a breakthrough in the way anti-cancer drugs are tested. A tumor cannot grow to a large size or spread until it has developed its own blood supply and leading research has looked for a way of halting capillary formation to stop tumors taking hold. But new findings have shown that scientists testing such treatments may not have been studying exactly what they thought they were....

Changing the color of single photons emitted by quantum dots

Researchers have demonstrated for the first time the conversion of single photons produced by a true quantum source to a near-visible wavelength. The ability to change the color of single photons may aid in the development of hybrid quantum systems for applications in quantum communication, computation and...

Charcoal biofilter cleans up fertilizer waste gases

Removing the toxic and odorous emissions of ammonia from the industrial production of fertilizer is a costly and energy-intensive process. Now, researchers in Bangladesh have turned to microbes and inexpensive wood charcoal to create a biofilter that can extract the noxious gas from vented gases and so reduce pollution levels from factories in the developing world.

Code RED for biodiversity

While not an outright failure, a 2010 goal set by the Convention on Biological Diversity for staunching the loss of the world's species fell far short of expectations. In the journal Science, some of the world's foremost biodiversity experts from DIVERSITAS, led by Arizona State University scientist Charles Perrings, offer a strategic approach to the 2020 goals being considered in Nagoya, Japan,...

Coniferous forests: New research changes understanding of atmospheric aerosol properties and climate effects

Terrestrial vegetation and atmospheric photochemistry produce large amounts of fine particles in the atmosphere, thereby cooling Earth's climate. According to new research, the physical state of the fine particles produced by coniferous forests is solid, whereas previously scientists have assumed that these particles were liquid. The new findings have major implications for our understanding of...