It's not the prehistoric monsters from the Jules Verne's Journey to the Center of the Earth or the human-bat hybrids of The Decsent, but it's an astonishing discovery nonetheless: intrepid scientists have discovered the world's deepest surviving terrestrial animal to date, a small wingless insect known as a springtail. Explorers discovered the new species, Plutomurus ortobalaganensis at a shocking 1.23 miles (1.98 kilometers) below the surface. The species was discovered by the Ibero-Russian CaveX Team Expedition in Krubera-Voronja Cave, the world's only known cave to go deeper than 2 kilometers. Eyeless, primitive, and surviving off fungi, Plutomurus ortobalaganensis lives an extreme existence in temperatures at the edge of freezing: from 32.9 to 41 degrees Fahrenheit (0.5 to 5 degrees Celsius). Three other new springtail species were discovered on the expedition, though Plutomurus ortobalaganensis dwelled the deepest, according to a paper published in Terrestrial Arthropod Reviews. One of its discoverers, biologist Sofia Reboleira with the University of Aveiro in Portugal, told LiveScience that the expedition survived off snow at base camp and risked hypothermia while spending hours searching for life in the cave. Notably, Plutomurus ortobalaganensis retains pigments meaning it could be a recent colonizer to these depths. Krubera-Voronja Cave is located in the remote southwestern Caucasus in the disputed region of Abkhazia.
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