The Chernobyl elephant's foot refers to the highly radioactive mass of corium, concrete, and other materials formed beneath the Chernobyl Nuclear Power Plant's reactor during the 1986 disaster. It's one of the most dangerous objects on Earth due to its extreme radiation levels.
The Chernobyl disaster occurred on April 26, 1986, at the Chernobyl Nuclear Power Plant in Ukraine, then part of the Soviet Union. It was the result of a flawed reactor design and human error during a safety test, leading to a massive explosion and fire that released radioactive material into the atmosphere. It's considered the worst nuclear accident in history in terms of both cost and casualties, with long-lasting environmental and health impacts.
