The Tuaregs (nomadic Berbers) of saharan Morocco and Algeria have a very ancient festival, the celebration of Achoura, when they feast in remembrance of the Exodus of the Jews out of Egypt, truly a monumental event of ancient history, so the word of it surely having spread rapidly, when plagues and drought struck great Egypt and two million Jews departed to the northeast, destined to control of the territory of Canaan.
But the drought which befell Egypt circa 1500 b.c. struck all of north Africa too, proven with the rock art of the Fezzan in Libya and the Tassili N’ Ajjer of Algeria, those beautiful scenes depicted on rock outcrops showing hippos and fishermen, cattle and crocodiles, horses and chariots, where now is stark Saharan Desert. And when you consider that ancient Egypt’s outpost for timber and ivory, the kingdom of Yam, is about a thousand miles to the east, you can see how word of the disaster in Egypt rapidly spread during that time of chariots when water was ubundant, that ‘though not for long thereafter.
Google rock art of Fezzan, and rock art of Tassili N’ Ajjer, to see the conditions there in the Sahara during the bronze age. And think about the Great Pyramid of Giza and the surrounding ruins in what now is desert, picturing that scene green with pastures and forests when those impressive structures were built, that environment then dramatically changed at the time of the Exodus, the disasters which befell Egypt confirmed in the egyptian historical record in the Ipuwer Papyrus written at that time. See much more here http://genesisveracityfoundation.com, the science of the future, old school man.