Arsenic is a naturally occurring element found in the Earth's crust. It is often associated with minerals and can be released into the environment through volcanic eruptions or human activities like mining. While arsenic has some industrial uses, it is most commonly known for its toxic properties. Exposure to arsenic can lead to serious health issues, including skin lesions, cancer, and cardiovascular diseases. In history, arsenic has been infamously used as a poison, often referred to as the "poison of kings." Many famous figures, such as Napoleon Bonaparte, have been rumored to have fallen victim to arsenic poisoning. Today, scientists study arsenic to understand its effects and to find ways to reduce its presence in drinking water and food.