Science and Innovation

Melissa Sevigny

The Grand Canyon’s North Rim is overrun with bison. They trample wetlands and lake shores and devour the grass. That’s changing the ecosystem, a situation that’s been building for more than a decade… Now the National Park Service intends to do something about it. KNAU's Melissa Sevigny reports.

NASA/Flickr

The Perseid meteor shower peaks this weekend, but it’ll be partially washed out by a bright moon. KNAU’s Melissa Sevigny reports on the best times to see it.


Lowell Observatory

Total solar eclipses cast an eerie darkness over the day, but astronomers say that's an ideal time to study the sun. Jeff Hall is an astronomer and sun expert at Lowell Observatory. He says when the sun’s brilliance is blocked out by the moon, other solar features appear.


U.S. Bureau of Reclamation

The Gila River Indian Community has agreed to leave forty thousand acre feet of its Colorado River water in Lake Mead. The goal is to stave off future shortages. KNAU’s Melissa Sevigny reports.

Melissa Sevigny

Flagstaff is a research hub for "near Earth objects"—space rocks that zip through our cosmic neighborhood. More than a thousand new objects are found every year and some of them could pose a threat to Earth. KNAU’s Melissa Sevigny reports on the people who keep a close eye on the skies.


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