Using a conveyor belt is hugely cost effective and they have been used in industry since the late 1800s. We're used to the image of products, toys, food and car parts traveling along belts inside a factory. But deep in Africa's Western Sahara, there's a particularly remarkable conveyor belt.
At 61 miles long, you can see the belt from space.
The belt is that straight, white line bisecting at the lower left corner. The white color comes from a strip of phosphates that get blown off the belt.
This belt connects Saguia el-Hamra region of Bou Craa with El Aaiún, the Moroccan-controlled area of the Sahara to carry 2,000 metric tons of rock every hour.
The phosphate of the rocks being transported is used in several countries for fertilizer.
It's the longest conveyor belt in the world and, despite quantities lost to wind, still the most productive.
Credit: Amusing Planet