At this time of year, it is almost impossible to enjoy your backyard or patio. That is largely due to one pesky insect: Wasps. They can form an overwhelming wave of chaos, and 2023 has been particularly atrocious. But in September, they really love to come out and play. Why do they become so aggressive right before the Fall temperatures roll in? Kristy Cameron chats with Rosalind Murray, an Assistant Professor of Biology at the University of Toronto.