The oldest known pair of shoes didn’t look like much, but foot fashion has come a long ways since prehistoric sandals.

This week, Joy Dolo and her co-host Daria lace up some matching footwear and take a hike through shoe history with reporter Nancy Yang. First stop is the Oregon cave where a 9,000-year-old pair of shoes was discovered by archaeologist Luther Cressman. Then, the story of a French king who tried to enforce a monopoly on his signature style: red heels. We’ll also meet Jan Matzeliger, the inventor who made shoes affordable for everyone.

Plus, is the future of shoes… bacteria? Researcher Lining Yao thinks so. You can read more about the “bacteria shoes” she helped developed with her team here.