A group of Italian scientists have found a system of liquid ponds under the south pole of Mars. The complex system has been detected around a bigger lake area that was found in 2018. The new lakes were found with the Marsis radar that Italian Space Agency ASI provided for the European Space Agency's Mars Express mission.

This underground lake region probably contains salty brines, according to a study published in Nature Astronomy coordinated by Elena Pettinelli and Sebastian Emanuel Lauro of the Roma Tre University and Roberto Orosei of the National Institute of Astrophysics (INAF) - the same group behind the first discovery.