Science Image Highlight: A 3D close-up of neural connections within the retina. Several bipolar and horizontal cell dendrites are connected to two cone photoreceptors. The image was generated from serial scans of the ground squirrel retina using an electron microscope. Courtesy: Retinal Neurophysiology Section, Dr. Wei Li, Chief; image created by summer intern Yizhen Zhang, finalist in the 2015 Intel Science Talent Search.