Life has adapted to all sorts of extreme environments on Earth, among them, animals like the deer mouse, shimmying and shivering about, and having to squeeze enough energy from the cold, thin air to fuel their bodies and survive.

In a new paper, Scott, Cheviron et al., have examined the underlying muscle physiology from a group of highland and lowland deer mice. Peromyscus maniculatus - deer mice - were chosen because they exhibit the most extreme altitude range of any North American mammal, occurring below sea levels in Death Valley to more than 4,300 meters high in the mountains. 

Researchers have taken a step toward using the implantation of stem cell-generated neurons as a treatment for Parkinson's disease.

 Parkinson's, which affect as many 10 million people in the world, is linked to a depletion of dopamine-producing neurons in the brain. Current treatments include medications and electrical implants in the brain which cause severe adverse effects over time and fail to prevent disease progression. Several studies have indicated that the transplantation of embryonic stem cells improves motor functions in animal models but the procedure has shown to be unsafe, because of the risk of tumors upon transplantation. 

Clearing grasslands to make way for biofuels may seem counterproductive, but University of Wisconsin-Madison researchers show in a study today (April 2, 2015) that crops, including the corn and soy commonly used for biofuels, expanded onto 7 million acres of new land in the U.S. over a recent four-year period, replacing millions of acres of grasslands.

Is there any point to the World Health Organization (WHO) making a recommendation that 3 people out of 1,000 can achieve? If not, Americans won't take WHO seriously, and the British respect those guidelines even less. Only 1 in 1,000 in the UK can meet WHO's targets for potassium and sodium.

The World Health Organization recommends we consume no more than 2,000 mg of sodium a day - less than a teaspoon of salt - supposedly because of studies showing it impacts heart disease and stroke. And they recommend at least 3,510 mg of potassium daily, again to lower our odds of heart disease and stroke.

A new study of 311 childless Danish women initiating assisted reproduction using donor semen finds that single women seeking treatment are no different than cohabiting women seeking treatment when it comes to sociodemographic characteristics or attitudes toward motherhood

The authors used baseline data collection in a multicenter cohort study from alll nine public fertility clinics in Denmark to examine sociodemographic characteristics, family backgrounds, reproductive histories, and attitudes towards motherhood in single vs. cohabiting women seeking treatment with donor semen. 

If you ever thought your spouse makes your blood pressure go up, you now have a study to show it.

Sociological and epidemiological papers have long linked stress and negative marital quality to changes in mortality and blood pressure but there has not been much to show how those correlate to married couples over time. Using systolic blood pressure as a gauge, researchers assessed whether an individual’s blood pressure is influenced by their own as well as their partner’s reports of chronic stress and whether there are gender differences in these patterns.