Atrapanieblas (fog-catchers) is the common name for constructions used to collect fog in the Atacama desert in Chile, one of the driest places on earth. The method was developed and patented in the 1960s by Carlos Espinosa Arancibia, an engineer at the Catholic University of the North in Antofagasta. He then assigned his patent to UNESCO so that it could be copied free of charge. Now atrapanieblas are being tested in over a dozen desert regions around the world, including Israel and Tanzania.