Most research has focused on the amount of global warming resulting from increased greenhouse gas concentrations but there has been relatively little study of the pace of the change following these increases.

A new paper concludes that about half of the warming occurs within the first 10 years after an instantaneous step increase in atmospheric CO2 concentration, but about one-quarter of the warming occurs more than a century after the step increase. The authors used results from the majority of the world's leading climate models - over 50 climate simulations, which were performed using 20 different climate models for the Climate Model Intercomparison Project, Phase 5 (CMIP5).  

More than half the people in Ontario who reported they had major depression did not use physician-based mental health services in the following year, according to a new paper based on OHIP data from the Institute for Clinical Evaluative Sciences.

Estimates claim that up to one in four people suffer at some point in their lives from depression, which reduces quality of life and is associated with increased disability and lower productivity at work. Women are diagnosed with depression more than twice as often as men. The analysis set out to see whether gender plays a role in seeking mental health care. In general, women use mental health services about 10 per cent more than men, reflecting the fact they use health care services overall more than men.

While heart disease still edges out cancer among all Americans, cancer is the number one killer among Hispanics in Texas. Yet their prognosis remains superior to Caucasians, a Hispanic paradox that debunks the notion that income and education are key factors in health care.

Heart disease is rather common in the general population but the risk is up to four times greater for diabetics, according to the National Institutes of Health. The American Heart Association estimates that at least 65 percent of people with diabetes die from heart disease or stroke. 

Researchers have identified a biological pathway that is activated when blood sugar levels are abnormally high and causes irregular heartbeats. This cardiac arrhythmia is linked with heart failure and sudden cardiac death.  

In 1963, Roy Kerr's hypothesis was of a "clean" black hole model and that remains the dominant paradigm. From theory to reality things may be quite different, black holes may be much "dirtier" than what Kerr believed, the authors write.

A tiny Micro-Electro-Mechanical System (MEMS) accelerometer used in smart phones to adjust the orientation of the screen could serve to create a real-time urban seismic network and increase the amount of strong motion data collected during a large earthquake, according to a new paper in the Bulletin of the Seismological Society of America.

Since the 1990s, (MEMS accelerometers have been measure the rate of acceleration of ground motion and vibration of cars, buildings and installations. They revolutionized the automotive airbag industry and are found in many devices used daily, including smart phones, video games and laptops.