Scientists discover evidence of ancient, nitrogen-rich Martian groundwater hiding in Antarctica

By Rafi Letzter A bit of 4-billion-year-old rock blasted off the Martian surface about 15 million years ago and eventually landed in Antarctica, where explorers found it in 1984. In the decades since, organic compounds found in that meteorite have been sources of controversy: Did they come from Mars, or did the meteorites get contaminated on Earth? Now, …