NASA’s Curiosity rover found a ‘sea of polygons’ on Mars

The latest discovery from NASA's Curiosity Mars rover is a field of honeycomb-shaped polygons covering a Martian valley called Valle Grande. As Gizmodo reports, Curiosity has snapped pictures of the unusual terrain texture before, called polygonal fractures, each about 1.5 to 3 inches wide, but NASA says it's previously only found them in small patches, "nothing on the scale discovered in Valle Grande." Curiosity captured a 360-degree panorama of the "sea of polygons" on June 19th and 20th…