"The implication of that is that again we're seeing the involvement of water, and it looks like this water was very widespread across the landing area," Grotzinger said.
It appears that the river would have extended from the rover's landing site all the way to Waypoint 1. The entire area that Curiosity has been driving across would have been covered by a stream bed, at one point or another, in the ancient history of Mars.
Curiosity isn't the only moving human-made object on Mars. The Opportunity rover, which launched in 2004, is still chugging along.
In 2020, NASA plans to send an even more advanced rover to "explore and assess Mars as a potential habitat for life, search for signs of past life, collect carefully selected samples for possible future return to Earth, and demonstrate technology for future human exploration of the Red Planet."
NASA recently announced a competition for proposals of what instruments the 2020 rover could carry.
It, too, may get humans closer to drinking water, and possibly even showering, on Mars.