What is the farthest layer in the earth people have been to?

What is the farthest layer in the earth people have been to?What is the farthest layer in the earth people have been to?
If you mean the deepest into the Earth people have gone - only partly into the crust.


Humans have tunneled into the Earth in mines looking for gold, diamonds, and other minerals. As of 2008, the deepest mine in the world is TauTona in Carletonville, South Africa at 3.9 kilometers (the Earth's crust can be as thick as 35 km).


The deepest borehole in the world is Kola Superdeep Borehole at 12.262 km (but this is a scientific borehole, not used by humans.What is the farthest layer in the earth people have been to?
Only into the crust. However, mantle material is responsible, in part at least, for ';Hot Spot'; volcanoes (such as those in Hawai'i, and mantle material has been discovered at the surface of the seafloor in areas near the Caribbean Sea.
We can't get past the crust.