Below you'll find a list of all posts that have been tagged as “Proceedings of the National Academy of Sciences of the United States of America”
A recent study using data from NASA’s Curiosity rover and published in the Proceedings of the National Academy of Sciences present data showing the presence of nitrates on Mars. This molecule, composed of one nitrogen and three oxygen atoms, may indicate that there was once a nitrogen cycle on ancient Mars, one of the necessary mechanisms on a planet to sustain terrestrial-like …
The unprecedented drought gripping California has deepened for the fourth consecutive year, having already set new records for the lowest annual precipitation levels on record. 2014 brought the highest calendar-year temperature for the state, while this February was the hottest on record and this January the driest. A recent study conducted by Daniel Griffin and Kevin J. Anchukaitis found that …
Across much of the Western world, 25 years of expansion of the medical system has actually led to people feeling less healthy over time, a new study has found. A researcher at The Ohio State University used several large multinational datasets to examine changes in how people rated their health between 1981 and 2007 and compared that to medical expansion …
In the first study of its kind since the 1920s, rats in New York City were found to carry a flea species capable of transmitting plague pathogens. In research appearing March 2 in the Journal of Medical Entomology, lead author Matthew Frye, an urban entomologist with Cornell University’s New York State Integrated Pest Management (IPM) Program, reported collecting more than 6,500 …
The increasingly frequent and severe droughts that have punished California over the past two decades—including the current record-breaking one—are primarily the result of human-caused climate change and will likely grow even worse, scientists at Stanford University warn. Published in Monday’s issue of the journal Proceedings of the National Academy of Sciences, the new research analyzes historical records, as well as computer simulations of global …
It may be possible to live longer and increase fertility by manipulating diet, according to world-first research in mice from the University of Sydney’s Charles Perkins Centre. Researchers showed for the first time in mammals that there is an ideal balance of macronutrients (protein, carbohydrates and fat) for reproduction and another, different ideal balance for increasing lifespan. The research, published …
