A recent peace deal between the Colombian government and FARC rebels has opened up remote areas of the country that were once too dangerous to visit. But some local environmentalists are worried. Where they see beautiful landscapes full of new species to discover, less scrupulous loggers and miners simply see a chance to make a quick buck. Jane Feeney wonders if Colombia can build peace without sacrificing its biodiversity.

Thanks to our partners in North America, we have a number of eclipse-related articles for you to enjoy following last night’s excitement across the Atlantic. On Mars, meanwhile, another natural phenomenon has scientists gripped. Fluffy, glittering snow is surely one of the most beautiful weather phenomena on our planet. It’s even more special when you consider that snow is actually quite rare in the solar system. But a new study now suggests that there are nighttime snowstorms on Mars. It shows that powerful downdrafts of air could even help this snow reach the surface, turning the red planet white. David Rothery explains.

Intermittent fasting diets such as the 5:2, where eating normally for five days is alternated with two days of eating restricted calories, certainly have millions of fans. But what does the science say? Nick Lesica says it’s more than just the latest fad. Not only does the data so far suggest part-time fasting works to cut weight, but animal studies also show some promise for treating diabetes.

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