Wadi Al-Hitan is the most important site in the world for the demonstration of this stage of evolution.
It portrays vividly the form and life of these whales during their transition.
Many of the whale skeletons are in good condition as they have been well preserved in the rock formations.
Semi-complete skeletons are found in the valley and in some cases, even stomach contents are preserved.
At that time, the so-called Tethys Sea reached far south of the existing Mediterranean.
At first, it was thought to be a huge marine reptile.
It was only later in 1902, that the species were identified as whales.
In the 1980s interest in the site resumed as four wheel drive vehicles became more readily available.
Wadi Al-Hitan, now a Unesco World Heritage site, is visited by only 1,000 people each year.
Sources:UNESCO/Tour Egypt/Photo credit
