Pictured above is a  lab-grown human mammary gland organoid, captured at 100x magnification.

An organoid is a three-dimensional organ-bud grown in vitro and shows realistic microanatomy. Organoid-growing techniques have improved over the last decade and has been called one of the biggest scientific achievements of 2013, by The Scientist.

The specimen was captured using confocal imaging – that involves scanning the specimen – by Daniel H. Miller and Ethan S. Sokol from the Department of Biology at the University of Cambridge in Massachusetts.

The image won 4th place in the 2015 Nikon Small World Photomicrography Competition.

Image credit: Daniel H. Miller & Ethan S. Sokol