Cores containing cross sections of sea floor sediment accumulated over 50 million years or more were extracted by drilling into the bottom, sometimes beneath three miles of water.

Scientists drilling deep beneath the city have discovered fossil evidence of exotic shells and coral.

It could drill its way down slowly to water on Mars or beneath the ice shell of Jupiter's moon Europa, looking for signs of life.

This took them several days to drill through; beneath it there was limestone heavily charged with water.

The floor had stopped swaying, but now it was vibrating, very faintly, as if someone was drilling their way through concrete, floors and floors beneath us.

Rocks of this age have also been proved by drilling beneath the Barents Sea, but nowhere else on the Norwegian continental shelf.

The oil was extracted after drilling through more than 20,000 feet (6,100 m) of rock beneath the ocean floor.

The website's mission is to "drill beneath the headlines" and provide readers with in-depth stories often skimmed over or skewed by mass media.

In 1986 the surface accessible for drilling beneath the seas stood at 15 million acres around the world.

Deathdealer's ground-penetrating radar showed a thirty-centimeter tunnel drilled beneath the road's hard surface from the building they'd just demolished.