In the TV series Pours and Alexender are shown being born at same time. However as per records Porus' younger son died fighting and in 326 BC Alender was only 29 ( her died 323 BC aged 32). How can Porus at 29 have a son aged enough to be fighting battle. Although no exact date of Porus birth is available Porus at time of battle of Hydaspas should be around 50 and double the age of Alexder.