How did an ancient meteor impact help America spread westward?
26:01
Surprising Implications of a Cave Discovery
22:18
I Found a Prehistoric Building on Top of America’s Most Famous Mountain
20:46
What did the Soviets discover in the Kola Superdeep well at a depth of 12,262 meters?
56:47
How did the Rocky Mountains Form?
27:55
Por que Los Angeles tem tantos incêndios graves?
29:02
These mountains are made of folded rock
15:12
Buried hills and hollows: the Ozarks' Precambrian landscape
24:49