evidence: Over the next decade, 16 more Amish children died while exercising, without warning. The same family that lost their daughters in 2004 lost two more children under similar circumstances. Amish children in other states died, too. [...] "We basically did genomic triangulation and figured that all of these sudden deaths and all of these different Amish communities were happening for the exact same reason: a double whammy, a double hit of this exact same duplication," Ackerman said. [...] Demczko said Amish communities tend to be small and insular, and members of the community typically marry and have children with people who are also Amish.