The basalt at Spier's has many distinctive holes or bubbles, known as vesicles.

In most species, two holes known as nares lead to the respiratory system.

The gas forms a thin disk around the black hole, known as an accretion disk.

The technology to bore the holes, known as deep soil mixing, was originally developed by the Japanese.

The head is placed in a special hole made to accommodate it, known as a rivet-set.

The first person would try to make the marble in a hole, often known as poison.

The holes, known as thermokarsts, had appeared suddenly when the permafrost gave way, like a rotting floorboard.

American scientists report the discovery of the two largest supermassive black holes known to science.

These rigs drill through holes in the drillship hulls, known as moon pools.

Other such holes, also known as voids, have been found before, but this find is by far the largest.