Koku Istambulova, believed to be the world's oldest person, died at 129 in Chechnya. The Stalin deportation survivor famously declared she had not experienced a single happy day in her lengthy life A woman believed to be the oldest person ever to have lived died at the age of 129. Koku Istambulova, who survived Stalin's persecutions, was due to celebrate her 130th birthday in June 2019, according to official pension documentation in Russia. Officials believed she was older than a woman recorded in the Russian Book of Records who died last month allegedly aged 128. Koku attracted attention last year...