Organic matter in Gale Crater

A self-portrait taken by the Mars Curiosity rover on Sol 2082 (June 15, 2018). A Martian dust storm reduced sunlight and visibility at the rover's location in Gale Crater. To the left of the rover, a drill hole can be seen in the rock at a target site called Duluth. Credit: NASA/JPL-Caltech/MSSS

Curiosity found large organic molecules on Mars that meteorites alone cannot explain

Further research, based on data from the SAM laboratory in Gale Crater and a model of radiative decay over approximately 80 million years, suggests that the abiotic processes examined (including meteorite supply) do not fully explain the abundance of