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

As we unroll its fragile pages, we embark on a journey to understand Africa’s vast and varied history. From ancient civilizations to modern nations, this map tells a story of change, conflict ...

"Sub-Saharan Africa is a big place with tremendous ... In addition to shedding new light on history, the map also has important modern applications, like combating wildlife trafficking.