The paper is about mapping a small portion of the brain. What’s interesting is the use of crowdsourcing to generate the mapping:
To map the roughly 1300 connections, or synapses, between the cells, researchers used an electron microscope to take millions of nanoscopic pictures from a speck of tissue not much bigger than a dust mite, carved into nearly 3700 slices. Then, teams of “annotators” traced the spindly projections of the synapses, digitally stitching stacked slices together to form the 3D map.
More at Science.
(Contributor: Haym Hirsh)