In the news, counting the calories: The UK government want shops to help us put 100 fewer calories in our baskets to beat obesity. So will it work? Also, archaeologists uncover the world's oldest fat factory - it turns out that Neanderthals were processing bones for their grease 125,000 years ago, but why? And on Mars the Curiosity rover captures close-up images of spiderweb-like patterns on the planet surface, but what made them? Listeners are also wondering whether green initiatives really do help to save the planet... Like this podcast? Please help us by supporting the Naked Scientists