The cross stands out greatly from its environment with evenly round sides.
Martian archaeological remains are millions of years old and thus have undergone more extensive erosion and degradation. Besides, Martian civilization was wiped out by a nuclear explosion.
The evidence supporting the assertion that Mars was the theater of a nuclear holocaust millions of years ago comes from the U.S. plasma physicist and propulsion technologies expert Dr. John Brandenburg, who obtained his physics PhD from the University of California
Credit for finding this goes to Raw Spirit. a member in Mars Moon Space.
Original Nasa link.
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