Past sea level has varied by somewhat more than a hundred metres. This is primarily due to the growth and decay of ice sheets (mostly in the northern hemisphere) with water evaporated from the sea. The Mediterranean Basin's gradual growth as the Neotethys basin, begun in the Jurassic, did not suddenly affect ocean levels. While the Mediterranean was forming during the past 100 million years, the average ocean level was generally 200 metres above current levels. However, the largest known example of marine flooding was when the Atlantic breached the Strait of Gibraltar at the end of the Messinian Salinity Crisis about 5.2
Red Sea–Dead Sea Water Conveyance planners was the Zionist leader Theodor Herzl. The Red Sea Dead Sea conduit was proposed at the end of the 1960s and was analyzed as part of the peace process between Israel and Jordan. In the late 1990s a team headed by Refael (Rafi) Benvenisti working with Minister Shimon Peres as the Minister of Regional Cooperation suggested to establish the stabilization of the Dead Sea water level ('Saving the Dead Sea') as a major objective of the project. It suggested building the project in stages in order to test the mixing of the two seas water phasing the big investment