UBC is an old school

 As a graduate student with a few years working experience, I felt like I am the oldest student in UBC. After staying here for two months, I gradually found that many students in UBC show extraordinary maturity, which is impossible for early-twenty young people to have. In the beginning, there are two first-year students told me they were software engineers before. Later, I found that many first year graduate students have almost  the same age as myself. Today, I was shocked by the fact that the three "young" girls in my class are  all above 27, and one of them is even above 30.  Why are there so many old students in UBC? They don't have to work!?