Space.com #Mercury’s Violent Volcanoes Shut Off 3.5 Billion Years Ago 9 August 2016 fborgosano Leave a comment Share: Violent volcano eruptions that shaped Mercury’s sun-scorched surface likely ended 3.5 billion years ago, which is strikingly early compared to the volcanic history of other terrestrial planets like Venus, Mars and Earth. from Space.com ift.tt/2bhiFCx Share: