| When drilling stopped in 1994, the hole was over 7
miles deep (12,262 meters),(572°F), that's pretty
HOT! My question is that if that's the deepest
humankind has gone, 7 miles deep & Earth has
continental crust of 35-40km which is 21-24 miles
thick (33,796 meters). How do we know Earth's
insides, like how were told in the books & by the
professors that there is a mantle & a core beneath
Earth's crust when we haven't gone that deep? It
is easy to go deep into space because it's empty,
but going deep into Earth, theirs a lot of pressure.
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