A unique experience in the Negev, exclusive to "Desert Days" sustainable tourism ecolodge in Israel! This trip combines a walk through untouched desert landscape with learning something about the environment and the chance to look for, and actually find, a unique item of historical value. Our walk begins at "Desert Days" eco tours and follows Wadi Tzofar until we reach a very special place, known only to local people. Here you can find genuine shark's teeth which are over 70 million years old, dating from the time that the desert was covered in water. The teeth are embedded in a layer of rock called "phosphorite" which was formed from the bones of sea creatures.