Also, there’s a 10th planet in the solar system, larger than Pluto. Space.com, elsewhere.
Water on Mars is a profound and important discovery. The existence of water’s long been suspected. In particular, the ESA may have found a frozen sea buried deep in the crust, and it’s thought there are large reserves of water buried in the poles. This discovery — persistent standing frozen water on the surface means we’re almost certain to find evidence that there has been life on Mars, and with standing water, chances skyrocket that we’re going to find life hanging around Mars right now, chilling. So to speak.