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Wetlands remove nitrate pollution from water effectively. An analysis shows that this effect is constrained in the United States by the distribution of wetlands, and could be increased by targeting wetland restoration to nitrate sources.
The gut is not the only part of the human body that hosts an important microbiome. The surface of the skin is home to a sprawling and complex microbial ecosystem, which interacts with the immune system and influences dermatological health.
An atlas of European river barriers has been made, by curating and correcting existing records, and by surveying 2,700 kilometres of waterways. It reveals that rivers are fragmented by an amazing number of obstructions.
Misoprostol can prevent and treat postpartum haemorrhage. But because it can also cause abortions, availability of the cheap medication is often tightly restricted.
Julie Gould explores professional identity and motivation by asking five researchers how they keep a childhood love of science alive, despite the setbacks.