Outcrops with thick salt deposits in Sicily. While wandering along the cliffs of the Mediterranean Sea — particularly in southern Italy and Sicily — one might come across outcrops composed entirely of ...

From Death Valley to Chile to Iran, similarly sized polygons of salt form in playas all over the world — and subterranean fluid flows might be the key to solving the long-standing puzzle of why.

The precipitation of salt out of sea ice created a feedback mechanism that might explain the formation of Snowball Earth, the most extreme climatic event in the history of our planet. The idea, ...