In dictionaries:
Kola Superdeep Borehole
The Kola Superdeep Borehole SG-3 is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of in 1989.
The Superdeep
a 2020 Russian horror film directed by Arseny Syuhin,Вышел трейлер российского триллера «Кольская сверхглубокая» based on the real-life Kola Superdeep Borehole.
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