Perseverance Finds Ancient Mars Warmer and Wetter Than Thought
New findings from NASA’s Perseverance in Jezero Crater suggest Mars during the Noachian epoch (about 4.1–3.7 billion years ago) was warmer and wetter than previously believed, with evidence of persistent rainfall indicated by kaolinite-rich clays and weathered rocks, challenging the cold, icy Mars theory and implying habitable conditions in the distant past.