A Martian crater that looks a lot like a tree stump from above is shedding light on the history of the red planet.
Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. At first glance, it looks like a tree stump but the circular feature in a newly released image captured by the ExoMars orbiter is actually an ice-rich crater on Mars.
Just as a tree's concentric rings can give us detailed information about Earth's past climate, the patterns inside the crater illuminate the history of the red planet, according to the European Space Agency . The image was taken last year by the camera on board the ExoMars Trace Gas Orbiter, a spacecraft launched by ESA and Roscosmos, Russia's space agency, that arrived at Mars in 2016 and began its mission in 2018.
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