David Thomas's articles EDITOR'S PICK SCIENCE The Real Mystery Of Sand Dunes Key Takeaway: Sand dunes, primarily formed of quartz and feldspar grains, can also be formed from ash, snow, and gypsum. They can record a history of climate changes and can be enormous, with the largest being as tall as skyscrapers. Only a fifth of deserts are covered by sand dunes, and only about a fifth […] Saving Bookmark this article Bookmarked
EDITOR'S PICK SCIENCE The Real Mystery Of Sand Dunes Key Takeaway: Sand dunes, primarily formed of quartz and feldspar grains, can also be formed from ash, snow, and gypsum. They can record a history of climate changes and can be enormous, with the largest being as tall as skyscrapers. Only a fifth of deserts are covered by sand dunes, and only about a fifth […] Saving Bookmark this article Bookmarked