The first modern humans to arrive in Europe and Asia migrated north out of Egypt around 55,000 years ago, according to a study published in May last year.
The study answered a long-standing question about the route early Homo sapiens took when spreading from the African continent.
It also showed most Europeans and Asians living today are more closely related genetically to people living in Egypt than in Ethiopia.
This suggests Egypt was the last stop for people migrating out of Africa 55,000 years ago rather than taking a more southerly route through Ethiopia.
Some scientists believed humans may have travelled from Ethiopia across the Bab el Mandeb strait to the Arabian Peninsula.
However, the latest research suggested a northern route from Egypt, through the Sinai peninsula and then out into Asia and Europe was the most likely route.