NASA scientists say meteorites can’t explain mysterious organic compounds on Mars

Scientists studying a rock sample collected by NASA’s Curiosity rover have uncovered something tantalizing: the largest organic molecules ever detected on Mars. The compounds — decane, undecane, and dodecane — may be fragments of fatty acids, which on Earth are most often linked to life. While non-living processes like meteorite impacts can also create such molecules, researchers found those sources couldn’t fully explain the amounts detected.