A net with large holes won't catch small fish. Likewise, the microscopic fibers in the protective mucus coatings of the eyes, lungs, stomach or reproductive system naturally bundle together and allow the tiniest disease-causing bugs, allergens or pollutants to slip by. But Johns Hopkins researchers have discovered a way to chemically shrink the holes in the mucus layer's netting so that it will keep out more of the unwanted particles. 

The run up to Valentine's Day is peak period for the lonely hearts business, says an advocacy group for the lonely hearts business. Many singles decide not to leave it to chance at this time of year, they say, and join dating agencies rather than leave their love-lives to fate.  The dating industries watchdog Association of British Introduction Agencies say the dating industry is thriving even amongst the doom and gloom of the economic crisis.

January 2009 registrations among member agencies were up 20% over the same period last year.    That means you'd better hurry and do it too, before all the people are taken!

Another reason not to eat pate de foie gras is discussed by Michael Greger of The Humane Society of the United States, Washington DC in a forthcoming issue of the International Journal of Food Safety, Nutrition and Public Health.

Harmful proteins fragments known as amyloid fibrils associated with damage to brain cells in Alzheimer's disease and to pancreatic cells in Type II diabetes can be present in the meat of poultry and mammals. These amyloids are not destroyed even with high-temperature cooking process.

There's another reason to dust off those running shoes. Vigorous exercise may help prevent vision loss, according to a pair of studies from the U.S. Department of Energy's Lawrence Berkeley National Laboratory. The studies tracked approximately 31,000 runners for more than seven years, and found that running reduced the risk of both cataracts and age-related macular degeneration. 

The research, which is among the first to suggest that vigorous exercise may help prevent vision loss, offers hope for people seeking to fend off the onset of eye disease. 

A common gene regulatory circuit controls the development of all dentitions, from the first teeth in the throats of jawless fishes that lived half a billion years ago to the incisors and molars of modern vertebrates (that includes you and me), say researchers from Georgia Institute of Technology and the University of Georgia. 

The jaguar, Panthera onca, has become an animal in danger of extinction over recent decades, due to the fragmentation and deterioration of its habitat, as well as hunting and illegal animal smuggling. As a result of this vulnerability, no individuals have been seen in the centre of Mexico since the start of the 20th Century. However, Mexican and Spanish scientists have now managed to photograph a male jaguar in this region.