The NASA rover "Curiosity" discovered what scientists say is the largest ever seen organic molecules on Mars, raising speculation about if life was created billions of years ago on the Red Planet.

The Mars Curiosity rover’s onboard mini-lab has helped confirm the existence of the largest organic molecules ever found on the Red Planet. The trio of long-chain compounds preserved in Martian soil are believed to be the remnants of prebiotic components required for life to develop on Earth.

Scientists know from extensive study here on Earth that life doesn't sprout from nothing—it requires a complex (and often mysterious) set of conditions to originate and thrive. It follows, then, that for life to have cropped up on other planets, a slew of specific prebiotic essentials once needed to be in place.