Tharsis is a large volcanic region on the planet Mars, known for its impressive shield volcanoes, including Olympus Mons, the tallest volcano in the solar system. This region covers about 1,700 miles (2,700 kilometers) and features a unique landscape shaped by volcanic activity and tectonic processes. The Tharsis region is significant for understanding the geological history of Mars. It is believed to have formed around 3 billion years ago and has influenced the planet's climate and surface features. Studying Tharsis helps scientists learn more about volcanic activity and the potential for past life on Mars.