THE Tian Shan mountains in Kyrgyzstan, where researchers have traced the origins of the 14th century Black Death.... —Reuters/ AFP TOKYO: A deadly pandemic with mysterious origins: it might sound like a modern headline, but scientists have spent centuries debating the source of the Black Death that devastated the medieval world.... Not anymore, according to researchers who say they have pinpointed the source of the plague to a region of Kyrgyzstan, after analysing DNA from remains at an ancien