When Jack Nunn encouraged his mother Barbara to share her DNA test results online it uncovered a vast cohort of new half-siblings
Jack Nunn was 21, his girlfriend a year younger, when she died suddenly while the pair were in England.
Nunn had been studying literature, but that shocking tragedy in 2007 threw him on to a new path that would end in a strange but unexpectedly positive discovery – that his grandfather was one of the world’s most prolific sperm donors, leaving him with thousands of close relatives.
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