We’re celebrating 20 years of Earth Science Picture of the Day during the month of September! Today’s photo features a popular EPOD from the past. Thanks to all of our followers (on the blog, Facebook, Instagram and Twitter) for supporting us. Thanks also to all of you who’ve submitted your photos. We’re most appreciative. This EPOD was originally published April 16, 2016.

Photographer: Joel Santos

Summary Author: Joel Santos

Shown above is an aerial photograph of the Danakil Depression region of Ethiopia showing patterns of harvested salt (top and bottom) and a caravan of miners and dromedaries (center) on their way to the salt extraction sites. At these sites chunks of salt are cut like bricks and then loaded on the camels. Note their shadows (traveling north) in the low Sun on the trail at right-center.

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