Dr Chris Smith and the Naked Scientist team present the latest science news, analysis and breakthroughs. In today’s programme: Why we might need to re-draw dinosaur faces: it turns out T Rex had lips - how did we miss that? Also, as the UK government moves to make laughing gas illegal we look at how it works and why they’re doing this. Plus these days nothing seems to be repairable - it’s almost as if manufacturers don’t want you to fix a broken gadget and instead buy a new one. We find out why that might be.