Curiosity's Sample Analysis at Mars (SAM) is a suite of instruments built to search for compounds of the element carbon that are associated with life. (Image credit: NASA/JPL-Caltech/Malin Space Science Systems) NASA's Curiosity Mars rover has found a diverse mix of organic molecules on Mars, including chemicals widely considered building blocks for the origin of life on Earth. The finding marks the first time a new kind of chemical experiment has been performed on another planet. Curiosity rover has been dutifully probing Mars' Gale crater and Mount Sharp since the robot plopped down on the Red Planet on Aug. 6, 2012 . The car-sized Mars rover is now wheeling about in the Glen Torridon region of Gale crater, a place that scientists believe could have supported conditions that were favorable to supporting ancient life, if it was ever there in the first place.…