Well, what else can it be? It is not April 1st, so my only explanation is that it is an Onion article that somehow was picked up by the BBC. What do you think? It reads exactly like one, right down to the picture of the pleasant bearded academic at the board, the well-scrubbed English schoolchildren, and the quotes from the children. The only thing missing is the page with the three heads (whose names and occupations change every week) making comments on the story. (Be sure to watch the video links of the demo too!)
This is the sort of science/mathematics reporting that I usually expect to read in the Guardian. All about someone “solving” the “problem” of dividing by zero by inventing a new number called “nullity”. I should be annoyed, but I woke up in a strange mood today and so I’m finding that it’s just funny. For appropriately angry comment, see Mark Chu-Carroll.