"Biography" . . . "Genealogy" . . . . . . . "African American lives. The past is another century" . "Documentary films" . "This episode presents fascinating discoveries about participants' lineages, thanks to DNA analysis, including a groundbreaking study linking Professor Gates to a powerful medieval Irish warlord and evidence that Peter Gomes' direct paternal line traces back to a Portuguese Jew who fled the country in the early 1500s to escape the Inquisition." . "History" . "Past is another century" . . . . . "Educational films" . . .