This interactive, designed and built by Slate’s Andrew Kahn, gives you a sense of the scale of the trans-Atlantic slave trade across time, as well as the flow of transport and eventual ...

IRON AGE GIRL:What is it? IRON AGE BOY:The cattle. NARRATOR:Tribes stealing from each other and fighting over land is a big problem. NARRATOR:A tribal meeting is called to discuss what to do. IRON ...