Ancient seashell found on Mars by Spirit Rover

On December 25, 2017, the Spirit Rover has found on Mars (Sol 2176) a ancient seashell. According to ufologists, it's an evidence that life existed on Mars…

Scott C. Waring statement:

What happens when a NASA rover, like the Spirit rover, digs in the Martian surface and out rolls an ancient sea shell two inches long? Nothing apparently, because NASA chose not to tell the public about it, as if it never happened. You can see that the surface below this area was dug up and the sea shell rolled out over the wet ground. Such a sign of ancient life would be world news, had NASA announced it. However, this is just another sea shell that I have found on Mars, which will go overlooked and soon forgotten.

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