The News story ‘Hungary rewards success’ (Nature 551, 425–426; 2017) understated the funding for the Hungarian Brain Research Programme. It received 18.5 billion forints, not 18.5 million.

And the News story ‘Science scrambles after storm’ (Nature 551, 282–283; 2017) erred in its description of karst. Karst is not a type of rock formation, but a variety of landscape formed by the erosion of rock.