Massive Mars volcano erupted non-stop for 2 bn years: Study
A research by US-based scientists has revealed that sometime in its 4.5-billion-year history, Mars had a single volcano that erupted continuously for over 2 billion years. The finding is based on the study of a 2.4 billion-year-old meteorite found in 2012. Notably, the largest volcano in the solar system, Olympus Mons, is on Mars and is over 27 kilometres tall.