Mars is basically a pretty arid place, so it’s pretty astonishing that the Mars Reconnaissance Orbiter was able to spot signs of liquid water on the planet’s surface.

But even more astonishing in a way is that one of the places where signs of water was spotted is a mere 50 kilometers from where NASA’s Curiosity rover has been exploring. After all, Mars is a pretty big planet, and signs of water have been spotted in only a handful of places.