Ancient Mars was warm and wet, not cold and icy

A recent study published in Ars Technica reveals that ancient Mars was warm and wet, not cold and icy, during the Noachian epoch. The discovery, based on kaolinite pebbles showing evidence of alteration under high rainfall conditions, contrasts with the prevailing theory that this era was mainly cold and icy. This finding has implications for the potential habitability of Mars during this time and is being further investigated by the Mars 2020 Perseverance Rover.