On ancient Mars, carbon dioxide ice kept the water running. Here's how Space.comChinese rover helps find evidence of ancient Martian shoreline ReutersChina’s rover uncovers compelling evidence of 3.5 billion-year-old Mars ocean Yahoo! VoicesA probable ancient nearshore zone in southern Utopia on Mars unveiled from observations at the Zhurong landing area Nature.comFlowing Martian Water was Protected by Sheets of Carbon Dioxide Universe Today