University of Arizona

University of Arizona Health Sciences

Mexican-American children north of the U.S.-Mexico border generally live in cleaner, healthier homes than those to the south. And yet, they have much higher rates of asthma. Scientists at the University of Arizona Health Sciences think exposure to some kinds of bacteria may be a good thing when it comes to asthma. They’re recruiting mothers and babies in Tucson and Nogales to test that idea, called “the hygiene hypothesis.” KNAU’s Melissa Sevigny spoke with Dr. Fernando Martinez about the study.

AP Photo/Matt York, file

Migrants trekking across the Arizona borderlands have died at higher rates in the two decades since stepped up enforcement began funneling them into remote, hostile desert and mountain regions.


Centers for Disease Control and Prevention

A committee of the U.S. Food and Drug Administration will meet tomorrow to discuss granting an emergency authorization to Moderna’s coronavirus vaccine. It’s expected to receive approval and could start shipping nationwide as early as this weekend. More than thirty thousand people volunteered for the clinical trial, which showed the vaccine is safe and effective. KNAU’s Melissa Sevigny spoke with one of those volunteers, Dr. Sam Keim, a professor of emergency medicine at the University of Arizona.

Matthew Verdolivo/UC Davis

At the end of the last Ice Age roughly ten thousand years ago, hunting was a group sport. That’s because hunters in North and South America had to tackle big prey like mammoths and giant camels. Archeologists often assume ancient hunters were men, but a new archeological study questions that idea. It argues at least some of those early indigenous hunters were female. KNAU’s Melissa Sevigny speaks with anthropologist Jim Watson of the University of Arizona about upending the “man the hunter” myth.

NASA Goddard Space Flight Center

A space mission led by the University of Arizona will make a daring attempt tomorrow to scoop up some pebbles from an asteroid. The OSIRIS-REx spacecraft is more than two hundred million miles from Earth and it has to touch a spot on the asteroid Bennu the size of a couple of parking spaces. It’s the first U.S. attempt to an asteroid sample back to Earth for analysis. Scientists say it could answer some big questions. KNAU’s Melissa Sevigny spoke with the mission’s science team chief Mike Nolan.