The phrase "dark continent" was historically used to refer to Africa due to its relative mystery and unfamiliarity to Western explorers. However, in modern times, the phrase is considered inappropriate and even offensive due to its negative connotations. Instead, synonyms such as "African continent," "sub-Saharan Africa," or simply "Africa" are more appropriate and respectful. It's important to avoid using language that perpetuates harmful stereotypes and instead strive to accurately and respectfully represent cultures and regions, especially those that have historically been marginalized and misunderstood.