sentences:  A new alternative was therefore accepted – to build a zoo in Mlynská dolina which originally covered and was later expanded to .Construction began in 1959 with the help of volunteers and students, and part of the zoo was officially opened on 9 May 1960.During the first decade of the existence of the zoo, there was already some achievement regarding breeding of macaques, baboons, porcupines, nutrias, leopards, pumas and dingos.