Original sentence: Encompassing 287 hectares (710 acres), the Toronto Zoo is the third largest in the world.In 1888, the Riverdale Zoo opened in Toronto.In 1963 a private citizen's brief to build a new zoo was introduced.It is divided into six zoogeographic regions: Indo-Malaya, Africa, the Americas, Australasia, Eurasia and the Canadian Domain.The following year, a feasibility study on the new zoo was submitted by architect Raymond Moriyama
Edited sentence: Encompassing 287 hectares (710 acres), the Toronto Zoo is one of the largest in the world - the third largest.It is divided into six zoogeographic regions with numerous indoor pavilions and outdoor exhibits.It wasn't until 1963 when a private citizen's brief to build a new zoo was introduced.The Zoo is divided into six regions based on geographic location: Indo-Malaya, Africa, the Americas, Australasia, Eurasia and the Canadian Domain.The evolution of the Toronto Zoo begins back in 1888 with the opening of the Riverdale Zoo.The following year, a Feasibility Study on the new zoo was submitted by architect Raymond Moriyama