Unraveling Mars' Mysterious Spidery Rocks
Mars is full of surprises, and the latest one is a set of strange, web-like structures spotted by the Curiosity rover. These formations, called "boxwork, " stretch up to 12 miles wide and look like giant spiderwebs from above. They are made up of mineral-rich ridges that crisscross each other, and scientists think they could tell us a lot about Mars' past, especially...