ナショナルジオグラフィックのインスタグラム(natgeo) - 7月10日 04時00分

Photo by @shonephoto (Robbie Shone) // We're following the work of a group of scientists from the Tunisian Geological Survey and European Research Institutions (UK, Germany, Austria and
SISKA in Switzerland) who are looking at changes in rainfall patterns through time. Several of their field sites lie inside Djebel Serdj, which hosts some of the largest caves in Tunisia.
One such site is Ain Dhab (pictured) which is largely a river cave with some higher fossil galleries. To reach their sampling sites, the scientists have to pass by many low sections where the roof comes down to meet the river.

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