New Biggest Ever Human Family Tree Includes 13 Million People
06 Marcha, 2018, 01:09 | Author: Enrique Watson
The family tree was created by incorporating data from one of the largest online genealogical websites. It's not so much the Smoking, for example, takes ten years of his life, saidYaniv Erlich of Columbia University in NY. The site contains 86 million public profiles and keeps a continuous and complete record of birth and death of each individual.
The team then used mathematical analysis to examine and organize the information, building an interconnected family tree that spans around 11 generations. While explaining the new discovery, Erlich stated that, "Through the hard work of many genealogists curious about their family history, we crowd sourced an enormous family tree and boom, came up with something unique". The dataset details when and where each individual was born and died, and mirrors the demographics of Geni.com individuals, with 85 percent of profiles originating from Europe and North America.
He added, "We hope that this dataset can be useful to scientists researching a range of other topics".
Before 1850, it was common for fourth cousins to marry. Before 1750, most people in the United States found a spouse within 6 miles (10 kilometers) of their own birthplace. But, moving toward later years, during 1950 people preferred to travel farther places, around 60 miles for marriage. Changing social norms, rather than rising mobility, may have led people to shun close kin as marriage partners, they hypothesize. The scientists tried to know that when people stopped marrying their cousins, where they traveled further for marriage in past and today and they tried to find out whether genes play an important role in longevity. "This fact is known from basic population history principles, but what the authors have achieved is still very impressive".
Peter Visscher, a quantitative geneticist at University of Queensland the reconstructed family three show that all humans are related to each other.
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