HumansKenneth Libbrecht interview: A grand unified theory of snowflakes Snowflakes can form in either a plate or column shape, but no one understood why – until physicist Kenneth Libbrecht investigated. His theory is the result of two decades making snow in the lab Features
HumansIs it true that use of synthetic fertiliser is increasing everywhere? Frequent reports decrying our ever-growing use of synthetic fertilisers don’t reflect reality and fail to see the bigger picture, writes James Wong Comment