How did an ancient geologic fault line form this 120 mile long valley?
36:55
Appalachian Geology: Surprising Implications
20:34
Why does crude oil seep out of the ground on this beautiful Caribbean Island?
11:35
Why Do Utah's Uinta Mountains Run East-West?
17:00
How An Ancient Ocean Shaped US History
25:39
Why did the river move at Chimney Rock...and what happens if we move it back?
25:17
A Gigantic and Mysterious Feature that Nobody has Heard of!
13:42
Doomsday Glacier collapse! Time for MORE human intervention??
16:56