Sand Origin

Ajali Sandstone, Iva Valley, Enugu

Random Sand Fact

Wet sand + the laws of thermodynamics are the base of an innovative, inexpensive, portable pot-in-pot “desert refrigerator” changing lives in Nigeria.

The only maintenance required to cool it is daily addition of water. When water evaporates from sand placed between two pots the inner one is cooled to as low as 5ºC/40ºF.

Its use, for example, means that spinach lasts 12 days instead of hours, tomatoes 3 weeks instead of just days. The inventor combined traditional craft with science to make everyday lives easier. With sand as a key part. 

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