Rageh Omaar is in Mali for the hugely popular Hippodrome horseraces, exploring the country's deep historical links to horses and how the races are an important lifeline to many. Lucy Watson is in Bosnia, where she meets a survivor of the Srebrenica genocide who has made it his life's mission to find the remains of those that did not survive. Debi Edward is in Sichuan China to witness the ingenious ways its scientists are encouraging pandas to mate.