This photograph (ESP_013177_1800) was taken by NASA’s Mars Reconnaissance Orbiter (MRO) HiRISE Camera on 19 May 2009.
NASA describes this photograph as “Possible Rootless Cones in Hydraotes Chaos.”
I discovered what look like artificial structures on the Martian surface. These include what appears to be a building, dam walls and an underground entrance-way amongst others
Pure speculation as always, these anomalies look like something unnatural and are not specifically something unnatural.
Original NASA source: https://www.uahirise.org/ESP_013177_1800
I downloaded the HiRise B&W Map-Projected JP2 file to view these anomalies.
Are these natural Boulders/Rocks or perhaps sign’s of some kind of activity on Mars?
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