Oldest Evidence Of Water Activity On Mars Found In Meteorite Grain

Australian researchers have uncovered the oldest direct evidence of hot water activity on Mars, suggesting the planet may have once been habitable. In a study published, a team from Curtin University analyzed a 4.45 billion-year-old zircon grain from the Martian meteorite NWA7034, or Black Beauty. The grain showed geochemical traces of water-rich fluids, indicating early water presence on Mars.