44. Jennifer Peters and Michael Taylor
Peters and Taylor of St. Jude's Children's Research Hospital are not traditional art photographers in any sense—they could probably be better described as medical or science researchers. But it was the duo's Bright Brain photograph that won the National Geographic's 2012 Microphotography Competition. Their image is "believed to be the first image ever to show the formation of the blood-brain barrier in a live... transparent zebrafish embryo." Peters and Taylor's prize-winning picture is comprised of several different layers of images; think of it as a bio-tech-photo-collage...or something.
Above: Bright Brain, 2012