This image, of the sub-components of fruit flies' ovaries, won the "People's Choice" award for 2014.
Each ovary of the female fruit fly consists of multiple ovarioles, tubes through which the developing egg passes.
In this picture, cross-sections of ten ovarioles from different fruit flies are arranged with stem cells and early stage egg chambers at the center, and the more mature chambers at the periphery. The nucleus of each cell is stained yellow/orange. The cell membranes are stained blue.
Yogesh Goyal (graduate student), Bomyi Lim (graduate student), Miriam Osterfield (post-doc), Stas Shvartsman (faculty)