A family dubbed "America's most inbred" reportedly started with identical twin brothers whose children married and had more than a dozen children together.
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Today, the family has been described as living in squalor and communicating in grunts, with heartbreaking genetic conditions thought to have been caused by inbreeding.
It reportedly began over 100 years ago with identical twin brothers Henry and John Whittaker, whose children married and had over a dozen children.
Henry and wife Sally had seven children together, including John Emory Whittaker, who was born in 1913.
John and his wife Ada, who was also his own first cousin, had nine children, including Gracie Irene Whittaker in 1920.
Double cousins John and Gracie then married and had 15 children together, MailOnline reported.
Mark Laita, who runs the Soft White Underbelly YouTube account, has shared a poignant insight into the Whittaker family in the modern day, who he says would bark at visitors, make animal noises at each other in lieu of conversation, and would often flee from people who came to see them. Mr Laita first met the family at their home in the village of Odd in 2004, and later came back to film them in 2020.
The genetic mix has been thought to have caused serious health problems.
He said on the Konkrete podcast: "It was out of control. There's these people walking around and their eyes are going in different directions and they are barking at us.
"And [this] one guy, you'd look at him in the eye or say anything and he would just scream and go running away and his pants would fall around his ankles."