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Algerian
Sahara. The barrows and the stone arrangements disseminated
all over the Sahara refer to a prehistoric civilisation based
on the capability of catching the quantity of water contained
in the atmosphere which in the presence of colder stone masses
condenses and is retained in the soil.
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Prehistoric
mausoleum near the oasis of Janet (Tassili n'Ajjer, Algerian Sahara).
These complex monuments, called solar tombs and made out of concentric
rings, can be interpreted as dew harvesting systems.
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Algerian
Sahara. The barrows and the stone arrangements disseminated all
over the Sahara refer to a prehistoric civilisation based on the
capability of catching the quantity of water contained in the
atmosphere which in the presence of colder stone masses condenses
and is retained in the soil.
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Olive tree moistened by a dry stone wall similar to the Nabatean teleylat in the quarry of Fantiano in Grottaglie (Apulia).
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Artificial
barrow of El Guettar (Tunisia) dating back 150,000 years. Adapted
from an illustration by Gruet, 1955
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Mounds
of stones in the shape of a crescent, circles and rows of stones,
found during archaeological excavations in the Hedomite and Nabatean
hydroagriculture, common in all arid and Mediterranean areas for
plant preservation.
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