The brain is arguably the most complex organ in our body, but this has not stopped scientists from trying to understand it. From functional magnetic resonance imaging (fMRI) to superresolution and electron microscopy, they’re attacking the problem from multiple angles. And now, the Human Brain Atlas, described in this poster, is adding a wealth of knowledge about where RNAs and proteins are expressed across all regions of the brain at a single-cell level. With this information, scientists can gain insights into the inner workings of individual cells, in addition to data on interactions between different brain cells. These insights can provide a foundation upon which to build an understanding of normal brain function as well as the etiology and pathology of neurodegenerative and other brain diseases.