New findings bring us closer to knowing the precise timing and duration of Mars' dynamo—a flow of molten metal within the planet's core that produces an electrical current
There is evidence that rivers once coursed across the Martian surface; a new study shows the water flowed long enough to record signs of ancient life as well
Organic compounds called thiophenes were recently discovered on Mars and an astrobiologist thinks their presence would be consistent with the presence of early life on the planet