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Ilmuwan Temukan Adanya Danau Kuno di Mars Sejumlah ilmuwan dari Universitas Utrecht Belanda telah mengungkapkan bukti geologis pertama tentang sistem danau kuno yang saling berhubungan, berada jauh di bawah permukaan planetMars . Lima di antaranya dianggap mengandung mineral yang penting bagi kehidupan. Sebelumnya, para ilmuwan meyakini pada permukaan Mars terpantau tanda-tanda kuat bahwa air dalam jumlah besar pernah ada di planet tersebut. Lalu, pada 2018, ekspedisi Mars Express mendeteksi genangan air di bawah kutub selatan Mars. "Mars kuno adalah dunia yang berair tetapi ketika iklim planet itu berubah, air ini mundur ke bawah permukaan untuk membentuk genangan dan air tanah," ujar pemimpin dari Universitas Utrecht, Belanda, Francesco Salese. "Kami menelusuri air karena skala dan perannya masih dalam perdebatan, dan kami menemukan bukti geologis pertama dari sistem air tanah di Mars," sambungnya.
Salese dan sejumlah rekannya menjelajahi 24 kawah yang tertutup di belahan utara Mars, kedalaman kawah itu berkisar 4.000 hingga 4.500 meter. Kedalaman kawah ini mengindikasikannya pernah terisi oleh genangan dan aliran air yang kemudian surut seiring berjalannya waktu. Itu mereka yakini karena penemuan sebuah fitur di dalam kawah tersebut yang hanya bisa terbentuk oleh air. Fitur itu termasuk ukiran saluran yang ada di dinding kawah, ukiran saluran tersebut melengkung diduga terbentuk ketika permukaan air naik dan turun. Teras bergerigi di dalam dinding kawah, terbentuk oleh genangan air serta endapan sedimen berbentuk seperti kipas dibentuk oleh aliran air. "Kami berpikir bahwa lautan ini mungkin telah terhubung ke sistem danau bawah tanah yang menyebar di seluruh planet ini," kata rekan penulis temuan lainnya Gian Gabriele Ori seperti dilansirEsa .
MengutipCnet , pada Juli 2018 lalu, para ilmuwan menggunakan radar pengorbit Mars Express untuk menyelidiki bentuk menyerupai topi yang menutupi es di bagian selatan Mars. Hal itu dianggap sebagai sebuah danau tersembunyi berisi air asin. Sementara pada 19 Februari lalu, sejumlah ilmuwan dari tim penelitian lainnya mengatakan bahwa kemungkinan danau itu terbentuk akibat dari aktivitas gunung berapi dari dalam kerak planet Mars. Munculnya danau di bawah permukaan Mars itu disebut-sebut dapat mendukung kehidupan.
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