While traditional history of mathematics courses extensively covers ancient Greek geometry and the calculus contributions of Newton and Leibniz, they often overlook significant mathematical developments from other cultures and pioneering work by underrepresented mathematicians. The ancient Babylonians’ foundational role in trigonometry and Graciela Beatriz Salicrup López’s pioneering work in categorical topology during the late 1970s and early 1980s exemplify the rich mathematical heritage beyond Western Europe. This second annual special session on the unspoken history of mathematics continues to illuminate the contributions of diverse cultures and historical figures typically absent from conventional curricula. Participants will engage with presentations celebrating overlooked mathematical traditions and innovators while collaborating to develop curriculum units and projects that expand history of mathematics courses. This session invites faculty and educators committed to helping students understand the diverse, interconnected, and truly global nature of mathematical development.