From lakes and grasslands with hippos and giraffes to a vast desert, North Africa's sudden geographical transformation 5,000 years ago was one of the planet's most dramatic climate shifts.
The transformation took place nearly simultaneously across the continent's northern half, a new study finds. The results will appear in an upcoming issue of the journal Earth and Planetary Science Letters.
http://www.livescience.com/28493-when-sahara-desert-formed.html
The answer would be the creation of the bicameral which is.
This distributes the representatives into two distinct assemblies, chambers, or houses.
It required for Germany as a county to claim that the First World War was their fault, basically to take the blame for the war.