They are also among the small army of genealogist volunteers ready to delve through the 1940 census data to make it more ... You're provided with a full family-tree PDF in chart and book form, ...

Infographics might seem like a modern phenomenon—citizens of the internet love nothing more than a nice and tidy presentation of catchy stats—but data viz dates way, way back. In The Book of ...

What This Unprecedented 13-Million-Person Family Tree Reveals. For starters, the new tree calls into question a prevailing theory for why people stopped marrying close relatives.