Uploaded October 2025 | Updated September 2026, 4 days ago
It's easier to go to other planets than send humans miles under the Earth's surface, so our knowledge of what's down there depends on surface observations, drilling, and remote sensing techniques. During the 1960s, deep drilling in the Appalachians encountered a surprise discovery more than 2 miles under the Earth's surface that changed the way we think about geology around the world. This video talks about what the geologists expected, what they actually found, and how we now think about geologic structure.
It's easier to go to other planets than send humans miles under the Earth's surface, so our knowledge of what's down there depends on surface observations, drilling, and remote sensing techniques. During the 1960s, deep drilling in the Appalachians encountered a surprise discovery more than 2 miles under the Earth's surface that changed the way we think about geology around the world. This video talks about what the geologists expected, what they actually found, and how we now think about geologic structure.
