NASA rover discovers mysterious light-toned boulder "never observed before" on Mars

NASA rover discovers mysterious light-toned boulder “never observed before” on Mars

While exploring a crater on Mars that may give scientists insights into life that potentially once existed there, NASA said its Perseverance rover made an unprecedented discovery. The rover, which landed on the Red Planet in 2021 specifically to probe the ancient Jezero crater, found a mysterious light-toned boulder earlier this month that was the first of its kind seen on Martian land.

Perseverance encountered the boulder while traversing the Neretva Vallis, a dried river delta that flowed into the crater billions of years ago, on its way to an area inside the rim where rocky outcrops are being examined for sediment that could shed light on Mars’ history, said NASA. The rover had changed course along its route to avoid rough terrain when, traveling a short cut through a dune field, it reached a hill that scientists have dubbed Mount Washburn.

The hill was covered with boulders, some of which NASA described as belonging to “a type never observed before on Mars.”

U.S. Geological Survey and NASA. The space agency said that some scientists on the Perseverance team speculated that the minerals detected on Atoko Point may have come from magma that originated below the surface of Mars and became exposed on the rim of the Jezero crater over time because of erosion. 

Other members of the team suggested that the boulder may have appeared out of place on Washburn Hill if it was really produced on a different part of the planet and moved with the ancient river channel to its present location on the rim. But NASA said all of the Perseverance scientists believe that more rocks with a similar composition must exist elsewhere on Mars.

NASA’s Perseverance rover was traveling in the channel of an ancient river, Neretva Vallis, when it captured this view of an area of scientific interest nicknamed “Bright Angel” – the light-toned area in the distance at right.


The rover discovered Atoko Point in the midst of its fourth “campaign” on Mars, which focuses on finding evidence of carbonate and olivine deposits in the interior of the Jezero crater. Both groups of minerals exist on Earth, with carbonate typically found in deposits near the shores of lakes and olivine typically associated with volcanic activity. 

They are of interest to scientists studying Mars —and they’ve both been observed already by Perseverance— because of their abilities to encapsulate remnants of the past for long periods of time. Identifying carbonate in the Martian crater could theoretically give scientists access to traces of ancient life on the planet preserved within the mineral itself, and olivine helps them understand when in history the Martian climate may have been conducive to organic compounds, like flowing water, and, potentially, life. 

Scientists say that learning about the makeup of Mars, and what it may have been like long ago, could help them figure out whether the planet’s current landscape could ever be habitable for humans. It could also offer important clues about the origins and evolution of life on Earth.

Emily Mae Czachor