Science and Innovation

Melissa Sevigny

Public health guidelines say to avoid crowded indoor spaces during the pandemic. But as schools reopen and people head back to the office, experts are looking for ways to measure how risky it is to share space and air with others. Scientists at Northern Arizona University are trying out an idea: simple carbon dioxide sensors in classrooms and science labs around campus. There’s even one here at KNAU. Science reporter Melissa Sevigny spoke with biologist George Koch to learn more about the project and hear our results.


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India now leads the world in coronavirus cases, with hundreds of thousands of people falling ill every day and a devestating death toll from the disease. The Navajo Nation is doing what it can to assist. President Jonathan Nez spoke with KNAU’s Melissa Sevigny about how Navajo citizens understand India’s suffering from their own experiences during the pandemic.  

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.


National Park Service

Here’s a fish story for you: what if you could get paid to go fishing all day? The National Park Service wants anglers to help get rid of exotic brown trout at Lees Ferry on the Colorado River. The agency is giving cash prizes for every fish to try to knock down their numbers. KNAU’s Melissa Sevigny reports, the program is an unusual experiment, designed to meet the goals of the Park Service but also respect the spiritual beliefs of the Zuni Tribe.

National Park Service, Lake Mead National Recreation Area

Newly released numbers from the U.S. Bureau of Reclamation project a high chance of shortages on the Colorado River within the next two years. KNAU’s Melissa Sevigny reports.


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