Where is the core of the earth?

The core of a round apple is in the middle and you have to take a few crisp, juicy bites to reach it. The core of the earth is also in the middle, but we would have to dig down, down through hundreds and hundreds of miles of tough rock to reach it: So far nobody has done this   nobody has come anywhere near the core of the earth.
This beautiful big world of ours is as round as the roundest apple. Of course, it does not have an apple stalk at one end and a little brown button at the other. Instead it has two poles, the North Pole and the South Pole. The earth is just a little fatter around the waist, which is half? way between the two poles. We live on the outer skin of the big, round earth, which fits around it like the skin of an app'l,,, This outer skin of the earth is called the crust, all wrinkled irith rocky mountains and gorges, flat plains and valleys. There are also wide, deep basins in the earths rocky crust which are filled with the watery oceans. In some places this crusty skin of the earth is 20, and in some places 40, miles thick. But the distance to the very .enter of the earth is almost 4,000 miles.
If we dug a tunnel through the earth's crust, we would have to dig a hundred times farther before we got to the middle of the big ball. Then we would be in just about the very center of the earth's core. And this is where the world is very, very different from a big round apple. In an apple the core is long, reaching almost from end to end. In the earth the core is a round ball buried under thick round shells A heavy rock, one outside another. The outside layer is the crust.
To get to the earths round core, we would have to dig way down through layers of rock. We would reach the core when our tunnel was down about 1,800 miles.
The earth’s round core is buried almost 2,000 miles under the solid ground. The center of the core is another 2, 000 miles down.
We know that the core is made of heavy materials such as iron and nickel. Billions of tons of rock crush down on the core, sealing it tight and making it hot   hotter than melted iron. But the round core, we think, is not solid like iron, nor a gas like the air and not a liquid like water. It may be a sort of waxy plastic, different from any materials we see on the face of the earth.

 Scientists hope to solve some of the mysteries of the earth's core with the project Mohole, They plan to dig down ten miles under the sea through the earths crust. They hope to see what happens to the deep layers sealed under the pressure of the rocky layers of the earth.
From this they can, perhaps, figure what even more of this pressure does to the deeply buried core of the earth.