text: what is the deepest that any human has ever digged into the earth?   40,000 ft  on russia's kola peninsula, near the norwegian border at about the same latitude as prudhoe bay, the soviets have been drilling a well since 1970. it is now over 40,000 feet deep, making it the deepest hole on earth (the previous record holder was the bertha rogers well in oklahoma--a gas well stopped at 32,000 feet when it struck molten sulfur).