(Credit: Volcan26/Wikimedia, CC BY-SA) The Earth is made up of layers. The lithosphere is the solid, outer part of the planet, including the brittle upper portion of the mantle and the crust. When ...
When I was a kid, I liked to dig holes in my backyard in Cincinnati. My grandfather joked that if I kept digging, I would end up in China. In fact, if I had been able to dig straight through the ...
Suppose you were to try digging through the earth, and that the planet was all solid. (We know that it’s not, but this is the simplest scenario.) The depth of a hole all the way through the ...