The deepest hole on Earth Explained

How deep can we really go? In 1970, Soviet scientists began drilling the and didn't stop for 22 years. What they found at 12,262 meters shattered every geology textbook on Earth. This is the full story of the massive rig, the impossible temperatures that melted drill bits, and the discovery that made Russian scientists seal the hole forever. Plus — the infamous recording that the world still debates today. From Stalin's race to the Earth's core to the microscopic plankton fossils found in 2-billion-year-old rock, this is one of the greatest in human history — and the most terrifying. 🔔 SUBSCRIBE for more documentaries on the world's greatest engineering feats — new videos every week.