Ilustration: Michael Viney

In the season of moulds, mildews and fungi, spare some dread for an organism, a protist, that shares its biology with potato blight and grapevine dise(...)

Extinction risk: Aphanomyces astaci killed more than 600 crayfish  in a stretch of the River Bruskey in Co Cavan. Illustration: Michael Viney

My trout-angling father-in-law, Seamus, pointed them out to me once from his boat in the shallows of a bay on Lough Mask: miniature mud-coloured lobst(...)