In many ways, the Lemba tribe of Zimbabwe and South Africa are just like their neighbours. But in other ways their customs are remarkably similar to Jewish ones. They do not eat pork, they practise male circumcision, they ritually slaughter their animals, some of their men wear skull caps and they put the Star of David on their gravestones. Their oral traditions claim that their ancestors were Jews who fled the Holy Land about 2,500 years ago. It may sound like another myth of a lost tribe of Israel, but British scientists have carried out DNA tests which confirm their Semitic origin.