This is a mature Daphnia magna imaged under a microscope at 20x magnification. The photo was taken at the end of the 21 day exposure to sunscreen so that we could measure its body length. The black ...

From spines on neurons to pollen on an insect’s eye, the winners of Nikon’s Small World photo contest offer a kaleidoscopic glimpse into a tiny world. These water fleas (Daphnia sp.) can reproduce ...