Deep in the Russian Arctic lies humanity's deepest wound—a 7.5-mile hole drilled straight into Earth's crust during the Cold War. The Kola Superdeep Borehole was a purely scientific mission that shattered everything geologists thought they knew about our planet. Soviet scientists discovered ancient water that shouldn't exist at those depths, two-billion-year-old microbial fossils, and temperatures so extreme the rock turned to plastic and stopped them cold.

We explore the engineering nightmares of drilling deeper than Mount Everest is tall, debunk the viral "sounds from hell" hoax, and reveal why—despite decades of technological advancement—no one has broken this 1989 record. The abandoned site now stands as a haunting reminder that we've explored more of Mars than the ground beneath our feet, and that Earth's interior remains one of the final frontiers.