NASA finds evidence of liquid water flowing on the surface of Mars
NASA told us it was announcing something big today, and it's certainly come up with the goods: the space agency says images from the Mars Reconnaissance Orbiter (MRO) have revealed compelling evidence of liquid brines flowing across the planet's surface. The seasonal rivers of salty water mean there's a greater chance of Mars being able to support life now or in the future. As far as space exploration goes, it's one of the most significant and historical announcements in many years, but it's not completely unexpected. NASA scientists have known for some time about the appearance of gullies or dark streaks on the surface of Mars during warmer weather - while it was suspected that trickling water was the cause, the new evidence means NASA is now almost certain. What's changed is that the agency's scientists have managed to identify and track hydrated salts in these gullies - using an image spectrometer on the MRO, the NASA team has been ab...