© 2025 KNAU Arizona Public Radio
Arizona Public Radio | Your Source for NPR News
Donate
Play Live Radio
Next Up:
0:00
0:00
0:00 0:00
Available On Air Stations
Both KNAU and KPUB stations are experiencing technical issues, resulting in dead air or overlapping audio. Our software vendor is attempting to resolve the issue.

Arizona Public Radio continues to integrate new audio software for both our news and classical services, resulting in some glitches.

We appreciate your patience and continued support.
Science and Technology News
Stories from around the region that engage and inspire.A special thank you to the City of Flagstaff BBB grant program and Flagstaff Cultural Partners for awarding KNAU $18,400 to help fund KNAU's Science and Technology Desk.

Carving Grand Canyon: New Theories About An Old Canyon

KNAU News and Talk - Arizona Public Radio | By Gillian Ferris
Published November 15, 2012 at 12:32 PM MST

Flagstaff geologist Wayne Ranney discusses some new theories of how - and when - the Grand Canyon formed. The second edition of Ranney's book, Carving Grand Canyon, was recently released.
Tags
KNAU and Arizona News Science and TechnologyGrand Canyongeology
Gillian Ferris
Gillian Ferris was the News Director and Managing Editor for KNAU.
See stories by Gillian Ferris
Related Content