Sir David Attenborough's next blue-chip wildlife series Dynasties is going global. The five-part series, produced by BBC Studios' Natural History Unit, the division responsible for Planet Earth and Blue Planet, has been pre-sold to 13 countries ahead of its global premiere. It has been picked up in Germany (WDR), New Zealand (TVNZ), Canada (Blue Ant Media), Latin America (Discovery), Spain (Telefonica), Belgium (VRT), Netherlands (NPO), Sweden (SVT), Denmark (DR)…