The “Happy Face Crater” on Mars Has Been Changing Right Before Our Eyes

The “Happy Face Crater” on Mars Has Been Changing Right Before Our Eyes

Who has an even bigger grin than ten years ago? This goofy-looking crater on Mars. These two images were taken by the HiRISE camera (High Resolution Imaging Science Experiment) on board the Mars Reconnaissance Orbiter and shows how Mars’ surface is changing over time – in this case, due to thermal erosion. The first of …

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