This week, we look back at more of the very best bits of Naked Science. We find out why scientists are swollen with success after discovering spider venom with Viagra-like properties, We meet a cow that produces skimmed milk straight from the udder, we remember a way to improve brain function and ask if a hot mint will still taste cold? Also - It's curtains for us! Joel Veitch explains why we should measure hazardicity in 'Curtains', we hear about some very clever birds who make plans for the future and we probe the hole in the ozone layer. Plus, we have two of the best kitchen science experiments - finding out how to make a jar of dry rice sticky, and if a beer belly can stop a bullet!