These mountains are made of folded rock
28:08
Is this famous Appalachian valley an impact crater or an ancient volcano?
28:42
Folding Rocks; From the Miniscule to Giant Mountains
21:55
No se puede llegar caminando hasta la cima de este pico de montaña único (¿hay un pequeño mundo p...
36:15
RFK Jr. & HHS: Last Week Tonight with John Oliver (HBO)
51:29
Have you ever seen TIME? Let's look through the lens of geology.
33:12
Is this the biggest boulder in the Appalachian Mountains?
26:01
Surprising Implications of a Cave Discovery
29:22