Grand Canyon
Spill-Over Theory
Flash Player Upgrade Required.
You must download and install the latest version of Adobe Flash Player to view this content. Click here to download.
There are theories as to how the Grand Canyon came into being. Could it have been carved out by an emptying lake?
Info
Check your local listings.
Grand Canyon: Spill-Over Theory
There are theories as to how the Grand Canyon came into being. Could it have been carved out by an emptying lake?
