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A 3-D visualization of the structure at the tip of a rat nerve cell's axon, called the synaptic bouton, reveals the machinery that allows neurons to send messages. B.G. Wilhelm et al. Composition of isolated synaptic boutons reveals the amounts of vesicle trafficking proteins. Science. Vol. 344, May 30, 2014, p. 1023. doi: 10.1126/science.1252884. Images: Allen Institute for Brain, EnCor Biotechnology Inc.; National Institute on Aging/NIH; Video: Wilhelm et al. 2014, Science Reported by Laura Sanders; Produced and narrated by Ashley Yeager