 The Augmin complex is essential for proper chromosome segregation during cell division. It is composed of eight subunits, each of which binds to microtubules in a specific orientation. These interactions allow Augmin to promote rapid and accurate branching of microtubules, which is necessary for proper chromosome segregation. Augmin's structure was determined using cryoelectron microscopy, revealing its conserved architecture among eukaryotic species. Additionally, evolutionary analysis showed that Augmin's structure is highly conserved, suggesting that it has been important for chromosome segregation throughout eukaryote history. Finally, Augmin was found to contain a previously unknown microtural binding site, providing further evidence of its importance in chromosome segregation. This article was authored by Sophie M. Travis, Brian P. Mahon, Wei Huang, and others.