Faster increases in life expectancy do not necessarily produce faster population aging, a counterintuitive finding that came as a result of applying new measures of aging developed at the International Institute for Applied Systems Analysis (IIASA) in order to project future populations for Europe out to the year 2050.

Traditional measures of age simply categorize people as "old" at a specific age, usually 65, but previous research by Scherbov, Sanderson, and colleagues has shown that the traditional definition puts many people in the category of "old" who have characteristics of much younger people. 

Poor sanitation is linked to 280,000 deaths per year worldwide but it has lots of benefits besides just saving lives. That is why sanitation is a key policy goal in many developing countries.

Strange sociological voodoo like a "community motivation" model to improve hygiene has done nothing, according to a recent analysis of Bangladesh, but it would if there are subsidies for hygienic latrines targeted to the poor. 

Scientists at the Vetmeduni Vienna investigated whether stomach ulcers in cattle are related to the presence of certain bacteria. For their study, they analyzed bacteria present in healthy and ulcerated cattle stomachs and found very few differences in microbial diversity. Bacteria therefore appear to play a minor role in the development of ulcers.

The microbial diversity present in the stomachs of cattle has now been published.

A drug commonly taken to prevent seizures in epilepsy may surprisingly protect the eyesight of people with multiple sclerosis (MS), according to a study released today that will be presented at the American Academy of Neurology's 67th Annual Meeting in Washington, DC, April 18 to 25, 2015.

For the study, the researchers randomly selected 86 people with acute optic neuritis within two weeks of having symptoms to receive either the epilepsy drug phenytoin or a placebo for three months. The researchers then used medical imaging to measure the thickness of the retina, the light sensitive nerve layer at the back of the eye at the beginning of the study and then six months later. Each patient's eyesight (including sharpness and color perception) was also tested. 

James Hansen, a former head of NASA’s Goddard Institute for Space Studies who was one of the first scientists to raise concerns about global climate change, spoke at MIT Tuesday in the biennial David J. Rose Lecture, sponsored by the Department of Nuclear Science and Engineering (NSE).

 Hansen came to prominence in the late 1980s, when he first testified before Congress about the perils of accumulating carbon dioxide in the atmosphere.

A new wearable device turns the user’s thumbnail into a miniature wireless track pad, which could let users control wireless devices when their hands are full or enable subtle communication in circumstances that require it, such as sending a quick text to a child while attending an important meeting.

Next week at the Association for Computing Machinery’s Computer-Human Interaction conference in Seoul, MIT researchers will describe the prototype of NailO.