The Singapore Zoo turns 50 on June 27. Here are some of its milestones over the five decades courtesy of The Straits Times artists Billy Ker and Lee Chee Chew. <br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
