Melissa Sevigny

3 days ago | knau.org | Melissa Sevigny

Federal agencies have finished digging out a side channel below Glen Canyon Dam that's been a breeding ground for nonnative fish. The -12 mile slough is a shallow, mostly disconnected part of the Colorado River in Glen Canyon National Recreation Area. Since March officials with the U.S. Bureau of Reclamation and National Park Service have worked to reconnect it to the main channel to bring in colder, faster, water. That should discourage nonnative species from breeding there.

1 week ago | knau.org | Melissa Sevigny

Work has begun on a long-awaited wildlife overpass on Interstate 17 south of Flagstaff. It’s the first of three intended for the area, which wildlife biologists say will dramatically reduce car crashes with elk and other animals. KNAU's Melissa Sevigny spoke with Jeff Gagnon of the Arizona Game and Fish Department at the construction site. KNAU: "Tell me where we’re standing right now and what we’re looking at.

2 weeks ago | knau.org | Melissa Sevigny

The Trump Administration cut funding and dismissed staff at the U.S. Global Change Research Program, which releases a Congressionally-mandated assessment of climate change every few years. It’s unclear if the program will be revived in the summer legislative budget. Northern Arizona University climate scientist Ted Schuur spoke about the loss of American expertise. What effect will that have on the science of climate change research?

3 weeks ago | knau.org | Melissa Sevigny

Dr. Tom Myers has worked as a physician on the South Rim of the Grand Canyon since 1990, and he knows all the ways people can get into trouble on a difficult hike. In fact. he co-authored the book Death in Grand Canyon. But that didn’t stop him from completing an epic journey on foot down the canyon’s entire length. His new book is The Grandest Trek. So you and your son went on this adventure kind of in segments over the course of… how long did it take you?

3 weeks ago | knau.org | Melissa Sevigny

The Suckley’s cuckoo bumble bee has a unique life cycle. Like cuckoo birds, they lay their eggs in the nests of other species instead of rearing their own young. True bumblebees live in colonies with workers and queens. But cuckoo bumble bees have a different strategy for survival. Males die after mating and females hibernate all winter in logs, stumps or holes in the ground. They emerge later in the spring than other bees, find a hive, kill the queen and take over the workers.