NASA Mars rover finds new clues pointing to past life on Mars

After the latest discovery by the Curiosity rover, scientists may be one step closer to searching for signs of past life on Mars.

About a year ago, the car-sized robot (one of two NASA rovers orbiting the red planet) came across an intriguing rock sample with some interesting features. Curiosity’s instruments detected organic compounds on the rock, mostly produced by living things on Earth.

Although geological processes also make material available, researchers concluded in one study: It was published It was stated on February 4 in the journal Astrobiology that such non-biological processes cannot be the only factor. Discovery opens door to possibility that life once existed AnthemHowever, scientists have given up on making this claim definitively.

Here’s everything you need to know About the latest discovery from his curiosity and observations.

What is NASA’s Curiosity rover?

NASA’s Curiosity rover with Perseverance One of the agency’s two car-sized robots We are exploring the surface of Mars for signs that the planet was once habitable.

Scientists believe the geology of Mars may hold valuable clues about past ancient life, and so robotic vehicles remotely controlled from Earth can slowly navigate the rocky terrain to collect and retrieve intriguing samples.

Curiosity rover It started its journey to Mars in November 2011In August 2012, it landed in Gale Crater, on the boundary between Mars’ cratered southern highlands and the smooth northern plains. While exploring the crater, which is believed to have formed 3.7 billion years ago, Curiosity collected 42 powdered rock samples with the drill at the end of its robotic arm.

Mars rover finds organic materials believed to be fatty acids

In March 2025, scientists reported detecting trace amounts of three different organic materials—decane, undecane, and dodecane—in a rock sample analyzed using Curiosity’s onboard scientific instruments.

The organic compounds, the largest ever found on Mars, were believed to be fragments of fatty acids preserved in ancient mudstone in Gale Crater, according to NASA. Fatty acids, produced mostly by living organisms on Earth, are an important indicator of life.

Living organisms may have created molecules in Martian rocks

Because Curiosity’s observations alone would not allow scientists to conclude that the molecules were made by living things, the researchers conducted a follow-up study of their own.

The main question in their mind was whether any non-biological source, such as a meteorite hitting the surface of Mars, could explain the presence of fatty acids.

To answer this mystery, scientists conducted radiation experiments and mathematical modeling to effectively peer back in time, exactly 80 million years ago. This is how rock samples bearing organic compounds are exposed on Mars and how long any organic material must be present before it is destroyed by exposure to cosmic radiation.

In the research, the team determined that non-biological sources could not, in fact, “fully explain the abundance of organic compounds,” NASA said in a statement in February. blog post We explain the findings. Therefore, they concluded that living organisms may have created fatty acids.

But they stopped short of saying this was conclusive evidence that life once existed on Mars, and said more work was needed to understand the process by which organic molecules break down on the planet.

Eric Lagatta is a Space Connect correspondent for the USA TODAY Network. Reach him at elagatta@usatodayco.com.

This article first appeared on USA TODAY: NASA’s Curiosity rover helps find possible signs of Martian life