Of about 250,000 women enrolled in an integrated healthcare delivery system, increased CT utilization between 2000 and 2010 could mean an increase in the risk of breast cancer for certain women, including younger patients and those who received repeat exams. According to the study presented today at the annual meeting of the Radiological Society of North America (RSNA), nuclear medicine examinations may also contribute to increased breast cancer risk. 

CT uses ionizing radiation in the form of X-rays to produce cross-sectional images of the body. In nuclear medicine imaging, a radiopharmaceutical—a compound that includes a small amount of a radioactive material—is delivered inside the body to help visualize internal organs.

A community of bacteria that survives in a dark, salty and sub-freezing environment has been discovered beneath nearly 20 meters of ice in one of Antarctica's most isolated lakes.

Lake Vida, the largest of several unique lakes found in the McMurdo Dry Valleys, contains no oxygen, is mostly frozen and possesses the highest nitrous oxide levels of any natural water body on Earth. A briny liquid that is approximately six times saltier than seawater percolates throughout the icy environment that has an average temperature of minus 8 degrees Fahrenheit.

We ended the second article in this series with the audacious claim that we have obtained the METRIC.¹  Quite frankly, I expected to hear a howl of protest to my brazen assertion that we had actually gotten so far.  We certainly hadn't obtained anything quite like the usual matrix or tensor form of a metric, or even a "line element", nor had we seen how this has any relationship to the usual "strangeness" of the Special Theory of Relativity.

It is the issues/questions of the metric, its relationship to the inner or dot product, and what forms it

What do you get when you combine onerous government regulations that have increased exponentially, experimental climates that mean lots of products just may not work, and if they do work you get a product that will only be yours for a few years and during that time a whole bunch of lawyers will look for ways to sue you?

You get modern biomedical research.  And a terrible climate for private investment.

A large number of friends on Facebook has been linked to higher levels of stress, according to surveys compiled by the University of Edinburgh Business School which found that the more groups of people in someone's Facebook friends, the greater potential to cause offense. No surprise, adding employers or parents resulted in the greatest increase in anxiety. 

Alaska's Columbia Glacier, an iconic glacier featured in the documentary "Chasing Ice" and one of the fastest moving glaciers in the world, will cease retreating around 2020, according to a study by the University of Colorado Boulder.

Their computer model predicts the retreat of the Columbia Glacier will stop when the glacier reaches a new stable position, about 15 miles upstream from the stable position it occupied prior to the 1980s.   

NASA's Cassini mission has spotted a second feature shaped like the 1980s video game icon Pac-Man, this time on Saturn's moon Tethys.The pattern appears in thermal data obtained by Cassini's composite infrared spectrometer, with warmer areas making up the Pac-Man shape.

A new substance class for the treatment of multiple sclerosis and other neurodegenerative diseases now promises increased efficacy paired with fewer side effects. To achieve this, a team of scientists have combined two already approved pharmaceutical substances with each other using a chemical linker structure.

A researcher has discovered a critical reason why women experience fertility problems as they get older. The solution could be simple — putrescine water.

Putrescine is naturally produced in mammals by an enzyme called ornithine decarboxylase (ODC) and is easily absorbed and cleared by the body. In female mammals, ODC levels are known to rise during ovulation, when the egg cell matures and is released from the ovary.  Dr. Johné Liu, a senior scientist at the Ottawa Hospital Research Institute and professor at the University of Ottawa, has shown that ODC levels rise very little in older females. He has also shown that inhibiting ODC levels in young mice leads to an increase in egg cells with chromosomal defects. 

Artificial Intelligence (AI) algorithms recently parsed 2.5 million articles from 498 different English-language (online) news outlets over a period of ten months and created data about what was contained.  Could AI qualitatively give people more interesting news?

The results showed what you likely knew - online tabloid newspapers are more readable than broadsheets and use more sentimental language. Among 15 U.S. and U.K. newspapers, The Sun was the 'easiest' to read - comparable to the BBC's children's news program, Newsround - while they found the The Guardian was the most difficult to read.