Only within recent years has archaeology attempted to reveal lost (or stolen) lineaments, or give serious treatment to the technologies of early African science. This includes the discovery of a seminal "black" kingdom in the Nile Valley predating the Egyptian dynasties. Five centuries of falsehoods have been exploded in just 5 years;
1. An astronomical observatory in Kenya 300 years before Christ.
2. The cultivation of cereals and other crops by "black" Africans in the Nile Valley 7000 years before any other civilization.
3. The domestication of cattle in Kenya 15,000 years ago.
4. The use of tetracycline by an ancient "black" African population 14,000 years ago.
5. A "black" African glider-plane 2,300 years old.
Even many notable African scholars embrace the myriad of great lies and myths, having concluded that the "black" African invented nothing, explored nothing and contributed nothing to man-kind... Oh, quite the contrary:
Consider the subject of metallurgy. It wasn't until the 1970s that the world was introduced to the reality that sub-Saharan Africans living on the shores of Lake Nyaza / Ukerewe, (or Lake Victoria) in Tanzania had produced carbon steel between 1500-2000 years ago. Their methods of metallurgy was technically more sophisticated than any developed in Europe until the mid-19th century. two American professors of engineering excavated 13 Iron Age furnaces. Temperatures achieved in African steel-smelting machine blast furnaces were higher than any achieved in European machines. African superiority not only led to extra-ordinary temperatures but also greater fuel economy, and the way they made use of their materials was in itself fascinating --- using mud lined from termite mounds since termites make their hills of materials with will not absorb water (composed of bits of alumina and silica piled grain-by-grain). The African process was through the formation of iron crystals rather than "sintering of solid particles" as with European steel smelting. In essence, the sub-Saharan African's produced the semi-conductor technology through the growing of crystals, and this technology extended into Rwanda and Uganda.
How about mathematics? While most Europeans achieved their mathematics from the Greeks (who used cumbersome letters of their alphabet for numbers), among the earliest evidence of the use of numbers is found in the Congo (former Zaire) areas --- known as the Ishango bone, a notation count over 8000 years ago. The Yoruba nation have possessed a complex number system for centuries. The mathematician Conant refers to it as "the most peculiar number scales in existence". One has to be really bright at math to handle the Yoruba one. It is a system based on twenty with relies on subtraction to a very high degree (also well known in various places through-out West Africa). It is a testimony to the Yoruba capacity for abstract reasoning. Also consider African FRACTALS; African Fractals: Modern Computing and Indigenous Design [Paperback]  (Author) Ron Eglash, Supreme Mathematic African Ma'At Magic. Why is mathematics so rarely mentioned in the study of the African?
Navigation. African engineering developed a variety of skillful constructed boats unlike the images and myths projected of fragile and easily capsizable "jungle canoes". The Central and West Africans (Niger) marine trade highway extends over 2600 miles long. After the fall of Mali and Songhay, and before Timbuctoo was destroyed, the trade routes leading into the interior of Africa lost much of their previous importance. Before this technology deteriorated, travelers saw varied types of craft on African rivers and seacoasts; French traveler Rene Calille' reported a flotilla of 80 large boats carrying on trade between the city of Jenne' and Timbuctoo. The average vessel was sixty to eighty tons, 12-14 feet broad at mid-ship, and drawing six or seven feet of water. The most unique boat found on the interior of Africa was a rope-sewn plank vessel, 90 to 100 feet long, and hosting decks as well as berths with cooking stoves.
In the year of 1913 alone, as many as 1000 inventions were patented by "black" Americans, and those were the fortunate few that made it past the patent office! Few people are even aware of the major contributions of "blacks" to modern technology. I will not delve into modern "black" science contributions, as the ancient realities are enough to twist most folks cap's backwards, while causing them to shout at the top of their lungs to their lord in utter disbelief.