NASA’s Curiosity rover finds more evidence that Mars was once habitable

As NASA’s Curiosity rover makes its way up a layered mountain on Mars, the little bot is finding even more signs that the Red Planet was once a habitable place — potentially capable of hosting microbial life billions of years ago. The rover has been drilling as it climbs, and the samples it has uncovered reveal this region of the mountain to have a variety of minerals, chemistry, and textures. These diverse samples are helping scientists paint a picture of how ancient groundwater int