Why do many scholars and Europeans says that Africa had o history and it's a dark continent

"Answer:

The most common answer to the question, “Why was Africa called the Dark Continent?” is that Europe did not know much about Africa until the 19th century. But that answer is misleading and disingenuous. Europeans had known quite a lot about Africa for at least 2,000 years, but because of powerful imperial impulses, European leaders began purposefully ignoring earlier sources of information.
At the same time, the campaign against enslavement and for missionary work in Africa actually intensified Europeans’ racial ideas about African people in the 1800s. They called Africa the Dark Continent, because of the mysteries and the savagery they expected to find in the interior."