Scientists have achieved a monumental milestone with the completion of the largest brain connectivity and functional atlas project to date, known as MICRONS (Machine Intelligence from Cortical Networks). The project delves into a 1 cubic millimeter region of the mouse brain, encompassing an astonishing number of over 200,000 cells, 4 kilometers of axons, and 523 million synapses. By seamlessly integrating electron microscopy data with advanced AI technology, researchers have meticulously mapped out a high-resolution brain connectivity atlas. This groundbreaking work offers a fresh perspective on understanding brain organization and neuron interplay. While the current project focuses on a fraction of the brain, it serves as a robust foundation for future endeavors in creating whole-brain atlases. Furthermore, Chinese research teams are diligently progressing in their studies of the whole-brain neural connectivity atlas of zebrafish, adding to the global effort to unravel the mysteries of the brain.