"We can actually see the constituent atoms of the molecules, so we can see, is there carbon here, is there hydrogen, is there phosphorus? Is there nitrogen? We can see all these things," she told Popular Science after her panel. She has a handy acronym for it: CHyN OPS (pronounced "chin ups"), or carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. Each of these elements have a hand in life on Earth, but ChemCam can't see how each of these individual elements interact to form molecules. So it can see hydrogen and see carbon, but can't tell if the two are paired together or not.