Tiny Trumpets

Stentors — or trumpet animalcules — are a group of single-celled freshwater protozoa. This image won second prize in the 2019 Nikon Small World Photomicrography Competition, and was captured at 40 times magnification by researcher Igor Siwanowicz at the Howard Hughes Medical Institute’s Janelia Research Campus in Ashburn, Virginia.

The best science images of the year: 2019 in pictures (Nature)