We've been to the moon but we still haven't discovered everything on our own planet yet. An expedition to world’s deepest cave, Krubera-Voronja in Western Caucasus, revealed an interesting subterranean community, living below 2000 meters and represented by more than 12 species of arthropods, including several new species for science. This deep cave biota is composed of troglobionts and also epigean species, that can penetrate until -2140 m. The distance from the base of the Krubera-Voronja system to the top is about the same as the height of seven Eiffel Towers. Ambient temperatures are constantly below seven degrees Celsius and it gets considerably colder the lower you descend. Water temperature is just above freezing.
The biocoenosis and the vertical distribution of invertebrate fauna of Krubera-Voronja are provided, from its entrance to the remarkable depth of 2140 meters, including the discovery of world’s deepest dwelling arthropod.
A new species of ground beetle named Duvalius abyssimus—was recently discovered by scientists exploring the subterranean fauna living up to 1.5 miles below the earth's surface in Krubera-Voronja. The new creature has adapted to a life without light in the world's deepest cave system, with extended antennae and a body that has no pigment. It is about a quarter of an inch long.