ナショナルジオグラフィックのインスタグラム(natgeo) - 2月9日 14時17分

Photo by @shonephoto (Robbie Shone) - Scientists from the University of Innsbruck in Austria work in the lower chamber of Devils Hole #2 cave in Ash Meadows, Nevada. The scientists are attempting to reconstruct past changes in the elevation of the water table in this region, which in previous different climate states has been much higher. Here a diver collects calcite samples from below the water table to work out how far it has dropped in the past, whilst a caver ascends the slope out of the chamber.

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