en.wikipedia.org
en.wikipedia.org
britannica.com
smithsonianmag.com
scientificamerican.com
Scientific American
https://www.scientificamerican.com › article › how-the-sahara-was-born
livescience.com
britannica.com
newworldencyclopedia.org
New World Encyclopedia
https://www.newworldencyclopedia.org › entry › Sahara_Desert
britannica.com
smithsonianmag.com
sahara.ma
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