sentences:  On 9 December 2013, NASA reported that the planet Mars had a large freshwater lake (which could have been a hospitable environment for microbial life) based on evidence from the Curiosity rover studying Aeolis Palus near Mount Sharp in Gale Crater.Comets contain large proportions of water ice, but are generally thought to be completely frozen due to their small size and large distance from the Sun.However, studies on dust collected from comet Wild-2 show evidence for liquid water inside the comet at some point in the past.