This study examined whether a traditional low-impact mind–body exercise, Tai Chi, affects health-related quality-of-life (HRQOL) and headache impact in an adult population suffering from tension-type headaches.

According to the National Headache Foundation, more than 45 million Americans suffer from chronic headaches, with losses of $50 billion a year to absenteeism and medical expenses and an excess of $4 billion spent on over-the-counter medications.

Tension-type headaches (TTH), which represent approximately 78% of all headaches, occur either in single episodes or chronically, and are often the result of temporary stress, anxiety, fatigue or anger.

The next 11-year cycle of solar storms will most likely start next March and peak in late 2011 or mid-2012—up to a year later than expected—according to a forecast issued by the NOAA Space Environment Center in coordination with an international panel of solar experts. The NOAA Space Environment Center led the prediction panel and issued the forecast at its annual Space Weather Workshop in Boulder, Colo. NASA sponsored the panel.

A study in Nature suggested that terrestrial plants may be a global source of the potent greenhouse gas methane, making plants substantial contributors to the annual global methane budget.

This controversial finding and the resulting commotion triggered a consortium (scientists from Plant Research International, IsoLife and Plant Dynamics in Wageningen, Utrecht University, and the Radboud University in Nijmegen) of Dutch scientists to re-examine this in an independent study. Reporting in New Phytologist, Tom Dueck and colleagues present their results and conclude that methane emissions from plants are negligible and do not contribute to global climate change.

Depression may be an early symptom of Parkinson's disease, according to research that will be presented at the American Academy of Neurology's 59th Annual Meeting in Boston, April 28 – May 5, 2007.

The study looked at whether people who are taking antidepressant medications are more likely to develop Parkinson's disease than people who are not taking the medications. It found that, in the year before their Parkinson's disease was diagnosed, people who were taking antidepressants were nearly twice as likely to develop Parkinson's disease as those who were not taking antidepressants.

Brains are able to adjust automatically to the demands of distinguishing between small differences in smell, new research at the University of Chicago shows.

The research, which was conducted on rats, suggests that the human brain may be more adept at distinguishing smells than previously thought. The work comes from studies in the laboratory of Leslie Kay, Assistant Professor in Psychology at the University, who is looking at the ways animals perceive sensory stimuli by focusing on the neural basis of olfactory perception and how context and experience influence it.

Vitamin C is possibly the most important small molecule whose biosynthetic pathway remained a mystery. That is until now.

A group of Dartmouth and UCLA researchers, who normally work on genes involved in aging and cancer in animals, discovered the last piece of the puzzle, they report in a study published in the Journal of Biological Chemistry.