A joint effort of citizen scientists and professional astronomers has led to the first reported case of a planet orbiting twin suns that in turn is orbited by a second distant pair of stars.
Aided by volunteers using the Planethunters.org website, a Yale-led international team of astronomers identified and confirmed discovery of the phenomenon, called a circumbinary planet in a four-star system.
Only six planets are known to orbit two stars, according to researchers, and none of these are orbited by distant stellar companions. (more…)
A study of the Twitter activity of 12 major news agencies shows varying levels of success for the social network as a news-sharing tool, based on factors like article lifespan and number of retweets.
Nearly every major news organization has a Twitter account these days, but just how effective is the microblogging website at spreading news? That’s the question University of Arizona professor Sudha Ram set out to answer in a recent study of a dozen major news organizations that use the social media website as one tool for sharing their content.
The answer, according to Ram’s research, varies widely by news agency, and there may not be one universally applicable strategy for maximizing Twitter effectiveness. However, news agencies can learn a lot by looking at how their news diffuses once it is posted on Twitter, said Ram, McClelland Professor of Management Information Systems in the UA’s Eller College of Management. (more…)
Complex brains evolved much earlier than previously thought, as evidenced by a 520-million-year-old fossilized arthropod with remarkably well-preserved brain structures.
The remarkably well-preserved fossil of an extinct arthropod shows that anatomically complex brains evolved earlier than previously thought and have changed little over the course of evolution. According to University of Arizona neurobiologist Nicholas Strausfeld, who co-authored the study describing the specimen, the fossil is the earliest known to show a brain.
The discovery will be published in the Oct. 11 issue of the journal Nature. (more…)
Physicians are about half as willing to prescribe drugs tested in pharmaceutical-industry funded trials than those in NIH-funded studies, a new study finds.
Physicians are less likely to trust the results of clinical trials when they know those trials were funded by pharmaceutical companies, regardless of the quality of the research, a recent study in the New England Journal of Medicine shows.
The study, led by Dr. Aaron Kesselheim of the Harvard Medical School in Boston and co-authored by University of Arizona associate professor of law Christopher Robertson, evaluated physicians’ confidence in the results of drug trials conducted with a high, medium or low level of methodological rigor. It then looked at how their confidence in those same results changed when a trial’s funding source was revealed as either the National Institutes of Health or a company in the pharmaceutical industry, versus when no funding source was disclosed. (more…)
Two UA journalism professors have interviewed Mexican journalists along to U.S.-Mexico border to determine how drug cartels affect news reporting in the area.
Two researchers in the University of Arizona School of Journalism have traveled the length of the U.S.-Mexico border interviewing 39 Mexican journalists to find out how the drug cartels are affecting what news people receive.(more…)
Trees Face Rising Drought Stress and Mortality as Climate Warms
LOS ALAMOS, N.M. — Combine the tree-ring growth record with historical information, climate records, and computer-model projections of future climate trends, and you get a grim picture for the future of trees in the southwestern United States. That’s the word from a team of scientists from Los Alamos National Laboratory, the U.S. Geological Survey, University of Arizona, and other partner organizations.
The research, published in Nature Climate Change this week, concluded that if the Southwest is warmer and drier in the near future, widespread tree mortality likely will cause substantial changes in forest and species distributions. (more…)
A UA study has found poverty, water scarcity, food insecurity and interdependence between the United States and Mexico along the border.
The U.S.-Mexico border is the border in the world with the greatest disparity in access to food and water needed for human survival, according to a report commissioned and published by the Southwest Center at the University of Arizona.
An endowment from the Kellogg Foundation and a UA Confluencenter for Creative Inquiry grant supported the study and its focus on assessing transborder food systems to understand water scarcity and food insecurity within the borderlands region.
The report underscores how in the globalized economy, Arizona and the rest of the United States rely on the skilled labor, water, fresh produce, fish, shellfish and livestock originating in northern Mexico; while in Mexico, the population is increasingly dependent upon frozen and processed foods originating in the United States. (more…)
Written by an expert cast of UA affiliates, “Last Water on the Devil’s Highway: A Cultural and Natural History of Tinajas Altas” is perfect for desert aficionados and armchair explorers wishing to learn more about southwestern Arizona.
Written by an expert cast of UA affiliates and well-known Tucsonans, this book is perfect for desert aficionados and armchair explorers wishing to learn more about the High Tanks, the iconic natural watering holes of southwestern Arizona.
The Devil’s Highway – El Camino del Diablo – crosses hundreds of miles and thousands of years of Arizona and Southwest history. This heritage trail follows a torturous route along the U.S. Mexico border through a lonely landscape of cactus, desert flats, drifting sand dunes, ancient lava flows and searing summer heat. (more…)
