now you see it, now you don't
now it's Hot, then..it was Cold

Camping at Wadi Al-Hitan (Whale Valley) - UNESCO World Heritage Center in Fayium, Egypt. This land contains invaluable fossil remains of the earliest, and now extinct, suborder of whales, Archaeoceti. These fossils represent one of the major stories of evolution: the emergence of the whale as an ocean-going mammal from a previous life as a land-based animal.

There is considerable evidence which indicates that the basin of Wadi Hitan was submerged in water some 40 to 50 million years ago. At that time, the so-called Tethys Sea reached far south of the existing Mediterranean. The Tethys Sea is assumed to have retreated north and over the years deposited thick sediments of sandstone and limestone visible in rock formations in Wadi Hitan.

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