Sand dune | Definition, Formation, & Facts | Britannica
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How are sand dunes formed and why do they even exist? | New Scientist
Canada's Tar Sands: Destruction So Vast and Deep It Challenges the Existence of Land and People - Inside Climate News
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Why is sand so scarce right now? - Futurity
What Really Turned the Sahara Desert From a Green Oasis Into a Wasteland? | Science| Smithsonian Magazine
The Secret Lives of Sand Dunes - Atlas Obscura
Sabu-Jaddi: The site revealing the Sahara's verdant past - BBC Travel
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Even desert city Dubai imports its sand. This is why - BBC Worklife
Who made the first stone tools? Discovery sheds light on mystery | CNN
Marine sandglass - Wikipedia
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Who made the first stone tools? Discovery sheds light on mystery | CNN
Prehistoric Massacre Hints at War Among Hunter-Gatherers - The New York Times
Inside the Syrian Refugee Camps Where Childhood Doesn't Exist | Time
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