Whether you buy into the theory of global warming or not, the fact remains that the nuisance known as "rock snot" is showing up more and more.
The range of didymo, commonly called "rock snot, used to be the cooler regions of North America and Alpine regions of Europe and Asia before turning up in New Zealand. Now, it's even turning up in Eastern Canada and while that may make sense from a temperature perspective, it still has researchers worried as this article suggests.