John Wesley Powell

Luke Runyon / KUNC

One hundred and fifty years ago, a group of explorers led by Civil War veteran John Wesley Powell set out to document the canyons of the Green and Colorado Rivers. It was the first trip of its kind. To commemorate the journey, a group of scientists, artists and graduate students from the University of Wyoming called the Sesquicentennial Colorado River Exploring Expedition has been retracing his steps this summer.