Protists are a diverse collection of organisms that do not fit into animal, plant, bacteria or fungi groups. While exceptions exist, they are primarily microscopic and made up of a single cell ...

Since the Victorian era, categorizing the natural world has challenged scientists. No group has presented a challenge as tricky as the protists, the tiny, complex life forms that are neither plants ...

That’s what pops to mind when I look at Sebastian Hess’ photos of a kind of plump, violent, single-celled creature he collected from a pond rich in sphagnum moss in southern Germany. The ...