While methane has been detected in the atmospheres of some exoplanets, its presence alone is not a clear indication of extraterrestrial life. Methane can be produced by non-biological processes as well, such as geological activities or photochemical reactions. To determine if methane is truly indicative of life on an exoplanet, further observations and analysis are necessary, including the search for other biomarkers and a comprehensive understanding of the planet's atmospheric composition and context.