It is the first bioavailable strontium isotope map to show predicted strontium isotope ratios across all of Sub-Saharan ... across 24 countries in western and western central Africa.

Sub-Saharan Africa Learning What Works Africa is the world's poorest continent. But for the first time in a generation—amid all the bad news—there is hope for change. An increasing number of countries ...

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