Some of the scientific explanations that promote natural formation include wind faceting and shifting of subterrain plates (Marsquakes ) .

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2015-06-30, “Pre-Crastination: The Opposite of Procrastination”, in Scientific American:

To increase the understanding of what the mouth of a yidaki player is actually doing, Hollenberg organised to have magnetic resonance imaging (MRI) scans done of him playing the instrument.