Frozen semen around 40-years-old has been used by Scots farmers to repopulate an extinct species of Aberdeen Angus cows as it was stored in liquid nitrogen.
Farmers Geordie and Julia Soutar sourced a "library of old semen" from the 1960s in a bid to tackle the diluted bloodline of Aberdeen Angus.
The couple have been running a worldwide genetics project from their rural farm in Forfar, Angus, for 26 years and have even named one super-fertile bull after Prime Minister Boris JohnsonSince the 1970s the Native Aberdeen Angus breed has become diluted with the prevalence of American beef in Britain.In 1995 there were only nine Native cow families certified by Aberdeen Angus Society in the world - prompting the couple to start their breeding
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