the Will-o'-the-Wisp

Will-o'-the-Wisp refers to a phenomenon where faint, flickering lights appear over marshes or wetlands at night, often leading travelers astray. Historically, these lights were thought to be spirits or supernatural entities. Scientifically, they are caused by small amounts of gases like methane produced by decomposing organic material in wetlands. When ignited, these gases create brief, floating flames. While mesmerizing, the lights are harmless, though they have inspired many legends about mysterious or deceptive spirits guiding or misleading travelers.