Colorado River Audiocasts
From the Grand Canyon National Park River Information Center
Three Mp3 audiocasts made from Grand Canyon National Park's Non-commercial River Trip Orientation Video may be played through you device or downloaded via the links below.
Did You Know?
No one has ever found a fossilized reptile skeleton or even an entire reptile bone within the Grand Canyon. Fossil footprints were left by more than 20 species of reptiles and amphibians, but no complete teeth or bones! More...