Mushroom season in Great Britain has more than doubled in length since the 1950s. Nature reports the season has increased from 33 days to 75, with some species fruiting twice a year, in both autumn and spring. This is a clear response to rising temperatures, says Alan Gange of the University of London. Although it’s been shown that climate change is making birds nest and flowers bloom earlier, he knows of nothing else that has added a complete extra breeding season to its life cycle. Will fungi come to rule the world? They have before. —Julia Whitty