Opening statistic: Iceland has only 320,000 people, about as many as Corpus Christi, Texas. That number makes this more believable:
[T]wo random Icelanders have about as much in common as second cousins, once removed, according to Dr. Kári Stefansson, CEO and co-founder of deCODE Genetics. That might sound like a lot, but accounting for the vast possibilities for genetic recombination in each generation, it really isn’t.
A consequence of this genetic similarity:
A collaborative venture between deCODE and software engineer Friðrik Skúlason, the Íslendingabók site developed as a corollary to deCODE’s genealogical research. “The reason why we have been able to lead the world in genetic research,” Kári Stefansson says, “is because we understand the structure of Iceland’s population so well.” DeCODE has an advantage over “the big guys in human genetics” because the organisation has intimate understanding of Icelandic genealogy, he says. “Our history is mapped in our DNA.”
DeCODE has attracted no small amount of international press over the years, but it is unlikely that its student app competition would have created such fervour now were it not for one of the novelty features of the winning ÍslendingaApp: the Sifjaspellspillir or “Incest Spoiler” alarm which alerts a user if the person she plans on going home with is a near relation. Using the app’s “new bömp technology,” users can tap their phones together and see how closely they are related. If the alarm has been activated — it’s turned off in default settings — it will either erupt with a discouraging siren, or issue a gleeful “No relation: go for it!” message, while a Barry White-esque voice urges you on with a subtle “Oh, Yeeeaaah.”
There are parts of the US, I am told, where an application of this sort might be useful.