Rats the size of small dogs have been filmed running through the Westfield Bondi Junction food court after construction above it shook them out of the walls. This opens up the rat stat nobody asked for: there are between 500 million and one billion rats in Greater Sydney at any given time. Nobody knows who counted them. They are chewing through car wires in underground car parks, they survived the plague, and they will absolutely outlast all of us. Sydney may need a rat czar. We are not okay.