Working out how Mars's carbon dioxide was turned into rock could help with carbon capture efforts on our own planet.
NASA has set a target date of 2030 for a manned mission to Mars. With no real scientific breakthroughs needed, success depends on developing the proper technology.
New research suggests that salty water exists on Mars in the summer months. But that wouldn't be the first time we hear of water on the red planet. So what's new and what isn't?