Mars Express detects water buried under the south pole of Mars

ESA's web page:
http://www.esa.int/Our_Activities/Space_Science/Mars_Express/Mars_Express_detects_liquid_water_hidden_under_planet_s_south_pole

Science magazine
http://www.sciencemag.org/news/2018/07/liquid-water-spied-deep-below-polar-ice-cap-mars