When I was a university undergraduate, I remember one my lecturers having to set aside a lecture to give a remedial lesson in grammar and the correct use of apostrophes. Too many students were being marked down for submitting essays in which they confused it's and its. It's is short for it is, and its is possessive.
Perhaps one of the Age's sub-editors could have benefited from this lesson. The lecturer was clearly embarassed that he needed to teach university students written English skills that they should have mastered before entering high school.