While genetic tests can reveal the ancestry of enslaved individuals, strontium analysis can now home in on where they actually grew up.

During its reign, the kingdom of Oyo—which was in present-day southwestern Nigeria, parts of Benin and Togo—captured and enslaved an estimated 128,000 people from West Africa. Using geographic ...

Africa is the world’s second largest continent and contains over 50 countries. Africa is in the Northern and Southern Hemispheres. It is spread across three of the major lines of latitude: the ...