The Chernobyl Disaster occurred on April 26, 1986, when a reactor at the Chernobyl Nuclear Power Plant in Ukraine exploded, releasing large amounts of radioactive particles into the atmosphere. This catastrophic event is considered the worst nuclear disaster in history, leading to widespread contamination and long-term health effects for those exposed. In the aftermath, thousands of people were evacuated from the nearby town of Pripyat, and a 30-kilometer exclusion zone was established. The disaster highlighted the dangers of nuclear energy and prompted changes in safety regulations worldwide, as well as ongoing efforts to manage the contaminated site.