Climate News Network: A fungus is heading your way. The caterpillars are on the march. So are viruses and any number of insects and nematode worms, and since 1960 they have been shifting north and south at an average speed of 3 kilometres a year as the world warms, according to researchers at Exeter University in the UK. Sandra Gurr and colleagues report in Nature Climate Change that they looked at more than 26,000 observations of 612 well-known crop pests and had access to observations made much earlier, including...