 Contemporary genetic studies show much greater levels of sub-Saharan African ancestry in the current-day populations of southern as opposed to northern Egypt.Professor Stephen Quirke, an Egyptologist at University College London, expressed caution about the researchers’ broader claims, saying that “There has been this very strong attempt throughout the history of Egyptology to disassociate ancient Egyptians from the modern population.” He added that he was “particularly suspicious of any statement that may have the unintended consequences of asserting – yet again from a northern European or North American perspective – that there’s a discontinuity there [between ancient and modern Egyptians]".National Geographic reported in their reference populations for their genographical DNA study showed that 68% of modern-day Egyptians are ethnically North African, with foreign invasions having little effect on the majority of modern Egyptians's genetics.