what you fail to realise is all Greek history was lost, we only know about their history because the Arabs wrote it down. and just as you said if cultures and civilizations learn from reach other, I'm pretty sure civilization started in Africa. the Europeans have stolen from us time.and time again. look back at history Europe was in the dark ages while Africa was the.center of knowledge during the same period. Europe wasn't civilized till the moors went in and taught the great monarchies of Europe. it's a known fact that Africans have been moving around the world since the beginning of time. they're are more people of.color on this plant then white. every race of color is derived from Africa, which would make them black . we are denied this history because if it was supported then how could the Europeans justify enslaving a continent that is still enslaved to this very day today.
In rebuttal....
1) Perhaps you're not familiar with Herodotus, the ******* of History, or Tacitus, Pliny the Elder, Polybius, Plutrach, all examples of Greek Historians from the 5th century BC to the 1st century AD. Or perhaps Thucydides and his
History of the Peloponnesian War, which is still in print today. Furthermore, if all Greek history was lost, how could the Arabs, whose rise didn't occur until the 7th century, have written it down? The Romans absorbed Greek culture and knowledge and added to it, meaning that the much later arriving Arab civilizations, whose golden age occurred during the Abbasid Era, would have then absorbed and expanded upon what they learned from Roman/Greek culture, to say nothing of the influence that the Egyptian, Chinese, and Indian cultures exerted on them.
2) Scientists and archaelogists, through the use of radio-carbon dating, have traced the beginnings of what we have come to call civilization, meaning non-nomadic, as having it's roots in what is Turkey, with nearly concurrent developments in Mesopotamia, Egypt, India, China, the Peruvian Andeas, and Mesoamerica.
3) Since you weren't the person who first posted the claim that all knowledge came from Africa and that Europeans stole it but you repeated it, I'll ask you to name the advances that were "stolen" from Africans by Europeans.
4) The Dark Ages (The Middle Ages) are a common misconception of life in Medieval Europe, and given that the Middle Ages are generally broken into three distinct periods by historians, each of which featured advances in learning and technology, you'd be hard-pressed to prove that this was a "dark age" for Europe on the whole.
5) It would be more accurate to say that the Arab world, or more accurately the Islamic world, was a center of learning of learning in this time (700 AD-1300 AD), but again, this makes no mention of anything taking place anywhere else in the world, especially China.
6) The footprint of Moorish civilization in Europe only encompassed the Iberian Peninsula (Spain and Portugal), sections of southern France, Malta, and Sicily, so to say that the Moors "went in and taught the great monarchies of Europe" would be an overstatement. This isn't to say that they contributed nothing- to the contrary, the Moors contributed greatly to the development of the Iberian Peninsula, with the most lasting legacy being seen in architecture.
7)
"Africans moving around the world since the beginning of time..."- if, in fact, all humans are descended from a common ancestor with African origin, then yes.
8)
"There are more people of color on this planet than white..."- considering all of the different shades of "color" that human skin takes on, I would expect that all of several different colors would outnumber all of one group. Also, you fail to consider negative birth rates in developed countries and the lack of widespread birth control use in less developed countries.
9)
"Every race of color is derived from Africa, which would make them black..."- the Chinese would probably have a problem with this statement, and you also to fail to account for evolutionary changes to humans over many millenia that might account for racial differences.
10)
"We are denied this history because if it was supported then how could the Europeans justify enslaving a continent that is still enslaved to this very day today."- Who is denying this history? Go to any college or university in America, on the undergraduate or graduate level, and there are departments of Black Studies, African American Studies, African Studies, African History, etc,etc. Scholars have done, and continue to do, research into these topics, nobody is trying to cover anything up.
Europeans didn't need to cover anything up to justify imperialism, they came and conquered or gradually took over based on largely economic (mercantilism) or geopolitical reasons.
And who is enslaving Africa today? With the exception of the cities of Cueta and Melilla and the
Plazas de soberanía, and islands off the coats and further off into the Atlantic, no part of continental Africa is controlled by any European country. 
