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PFP test - Science
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2025-12-02 09:00:14
WWW.LIVESCIENCE.COM
Trio of 'black mesas' leftover from Paleozoic era spawn rare sand dunes in the Sahara Earth from space
A 2023 astronaut photo shows three dark hills, or mesas, towering above part of the Sahara desert in southern Mauritania. The structures are remnants of a single Paleozoic era formation, and have helped to create a series of striking sand dunes.
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