the.com/drilling
making a hole on purpose, the most violently optimistic act there is.
deepest holeKola Superdeep reached 12.2 km before heat stopped it
sound trickdentist drills hurt your ears before your nerves
oil originfirst commercial well struck in 1859 Pennsylvania
brain surgeryancient skulls show drilled holes patients survived
diamond tippedhardest bits cut rock by being harder than rock