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Home This image shows the finely layered internal structure of a stromatolite from the Pilbara Craton in Western Australia. (NASA/JPL-Caltech) This image shows the finely layered internal structure of a stromatolite from the Pilbara Craton in Western Australia. (NASA/JPL-Caltech)

This image shows the finely layered internal structure of a stromatolite from the Pilbara Craton in Western Australia. (NASA/JPL-Caltech)

This image shows the finely layered internal structure of a stromatolite from the Pilbara Craton in Western Australia. (NASA/JPL-Caltech)

This image shows the finely layered internal structure of a stromatolite from the Pilbara Craton in Western Australia. (NASA/JPL-Caltech)

The rocks along the shoreline of Lake Salda in Turkey were formed by microbes that trap minerals and sediments in the water. Studying these ancient microbial fossils on Earth help Mars 2020 scientists prepare for their mission. (NASA/JPL-Caltech)
Scientists from NASA’s Mars 2020 and ESA’s ExoMars projects study stromatolites, the oldest confirmed fossilized lifeforms on Earth, in the Pilbara region of North West Australia. The image was taken on August 19th, 2019. (NASA/JPL-Caltech)