At the confluence of White Canyon and the Colorado River, bubbling gas billows from a cone made of mud. This "mud volcano" was discovered by staff from the Glen Canyon Institute and the Returning Rapi...

ST. GEORGE — Sand waves flow behind Jack Stauss, repeatedly rolling and breaking near a debris-heavy section of the river as he discusses sediment-related phenomena in Lake Powell. “That’s the delta m...

ST. GEORGE — Tamarisk are highly flammable trees that can increase flood risk and soil salinity along the Virgin River and throughout the Colorado River Basin, but an endangered bird species taking up...