The
BBC has an
article by
Harun Mehmedinović (with its usual
unbloggable video) about
White Sands in New Mexico:
The White Sands National Monument in New Mexico is truly unique. It is the largest gypsum dunefield on the planet. Gypsum dissolves in water, unlike normal sand, so it tends to get washed away. But in this one spot, the climate is dry enough that the gypsum sand has spread over nearly three hundred square miles.
Filmmaker Harun Mehmedinović captured time-lapse footage, which reveals that the gypsum dunes move in waves, like a dry ocean.
Rico says he saw it, many years ago, in one of his trips to New Mexico, and it's as impressive as the video shows...
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